The test assumes that a version string looks like this
2.9.0-123-gabcabcababc. We want to append a flow string
after <major>.<minor>.<patch>. Fix the test accordingly.

Needed for #6183

Regex for validating version was expecting a single
character (digit) for version `patch`, but it's not correct.
This patch fixes test behaviour for tarantool 1.10.10

Close #6039

- convert print statement to function. In a Python 3 'print' becomes a
function, see [1]. Patch makes 'print' in a regression tests compatible with
Python 3.
- according to PEP8, mixing using double quotes and quotes in a project looks
inconsistent. Patch makes using quotes with strings consistent.
- use "format()" instead of "%" everywhere

1. https://docs.python.org/3/whatsnew/3.0.html#print-is-a-function

Part of #5538

Part of #4967

After the patch which made os.exit() execute on_shutdown triggers
(see commit 6dc4c8d7) we relied
on on_shutdown triggers to break the ev_loop and exit tarantool.
Hovewer, there is an auxiliary event loop which is run in
tarantool_lua_run_script() to reschedule the fiber executing chunks
of code passed by -e option and executing interactive mode.
This event loop is started only to execute interactive mode, and
doesn't exist during execution of -e chunks. Make sure we don't start
it if os.exit() was already executed in one of the chunks.

Closes #3966

replication/cluster.test.py would fail at server exit, because
at_exit() handler tries to destroy a cbus while its mutex is locked.

args.test.py would fail when run with 'make test'

Follow up #1265

Finally fix compatibility with Lua 5.1 command-line options.

Closes #1265

  -e EXPR - execute string 'EXPR
  -l NAME - require library 'NAME'

A part of #1265

getopt_long() is available on all supported platforms.
Get rid of legacy gopt and use getopt_long().

Incompatible changes:

 * `tarantool --version --no-such-option` printed
    "unrecognized option '--no-such-option'", now it displays version.
    `tarantool --no-such-option --version` still prints an error message.

Needed for #1265

Test_suite restart disabled
Legacy tests moved to separated suite

Remove command line options:

--cfg-get
--check-config
--config
--init-storage

- these are gone forever, in preparation for config-less start.

--background --  move to tarantool.cfg for now, in the future
it will be part of Lua config.

Make #! mandatory - if the server is started without #!, it's
only possible to query its version or get startup help (--version
and --help are the only remaining supported options).

When #! is present, do not parse options, pass them wholly to the
script at hand.

Add helper scripts to test suites, to start/stop the server.
For now, the scripts are empty, in the future they will be
merged with a respective config file.

Important changes:
  * lua_libs are now copy from TarantoolServer (if you need, e.g.,
    to copy .lua or .xlog file when you starts server you may
    simply add it to server.lua_libs variable, and in the end
    simply delete it)
  * server now stops on random ports, for your convinience, when you
    `--start-and-exit` test-system - it shows on what port it starts
  * when you want to create a server, that is replica of some other
    server, you must do something like `replica.rpl_master = master`,
    then all will be ok. if hot_standby, then
    `hot_standby.hot_master = master`. when you stop working with it:
    `replica.rpl_master = None`..
  * new option: server.shebang is used for running scripts, no need
    to spoil server.binary now.
  * for config, init_lua and other options now there are decoreators.
    you may use relative paths now.

Other:
  * Some tests were rewritten for new TarantoolServer
  * Add `environment variables` for lua tests, possible to send it to
    server.
  * add rpl_master and hot_master for server directives in lua_tests
    (better idea, it seems, to move all `replication/` tests to python)

Some issues:
  * --valgrind:
    1. `chase_cuOff: no entry for 0x07422`... It garbages output.
    2. If you redeploy server then valgrind log is overwritten.
       Possible solutions:
         a) `valgrind_disable` this tests.
         b) Append logfile with temporary logfiles.
    3. Some memory leaks: need to be fixed.
  * --gdb: some minor code problems, all works, but tests, that
    crashes server won't work (new system of knowing that server
    is up)
  * Need of minor(!!) cleanup

Returning tests to their previous place. Fixing error in tarantool_connection, that prevernts reconnection. Fixing bug in cas.test

Move third_party library compilation to the top level (less
directory traversal).
Provide an option for using system LibEIO/libobjc.

Enforce a naming convention for cmake/ scripts
(Find* and Build*).

Move ev and eio wrappers to third-party (todo: delete
them completely).

There is one (known) problem with this patch:
tarantool --version now prints incorrect compile flags.
To be fixed in a separate patch.

macosx2: merging in (manually) previously unmerged changes (from macosx-port1), non-working tests: box/lua.test, box_big/lua.test connector_c/xlog_rpl.test

- release_disabled test suite ini file option support
- debug build only error-injection test, cmake build cleaner output
- tarantool server version output with build flags

A fix and a test case for
https://bugs.launchpad.net/tarantool/+bug/750658

--background neither closes nor redirects stdin/stdout/stderr

--background option didn't work properly, since stdin/stdout/
stderr streams were left open and pointing to a terminal.

This lead to a hang when tarantool was started from a
shell script or over ssh.

If --background option is given, we need to fork,
try to create a pid file, close stdin/stdout/stderr
and then initialize the logging
subsystem.

Bug#748630, Make --help and --version follow GNU standard: 1.4
part.

Rename --daemonize to --background to follow the GNU
convention.

A fix and a test case for
https://bugs.launchpad.net/tarantool/+bug/748599
"tarantool_box --cfg-get="custom_proc_title" --> crash"

A check was missing.

	 generalize Server class
	 implement TarantoolServer class
	 implement TarantoolSilverboxServer class
	 implement TarantoolFeederServer class
	 a lot changes in interfaces and bugfixes

A fix and a test case for Bug#726778 "Gopt broke wal_dir and
snap_dir: they are no longer relative to work_dir".

Ensure that snap_dir and xlog_dir can be relative to
work_dir.
Ensure that chdir happens before we handle --init-storage.
Do not mix declarations and definitions for recovery_state.
Add a test case to args.test.

Correct a regexp pattern in test suppression filter
to work in a more modern version of python.
In the new python \S matches '"', and the test
output is different compared to the recorded one.

Add the simplest CPack configuration for
'make package' and 'make package_source'
targets.
Add an empty snapshot to revision control
to use in 'make package' and thus
spare the user from the need to do
--init-storage.
Modify args.test to accept a bare
(no git version) version number, and thus
ensure the user from a yet another call before
he/she can start work/play around.

Add coverage for (almost) all admin options.
@todo: test 'exit'

Add coverage for more test options.
Make test results more host-independent.

Extend lib/test_suite.py: if we filtered out
entire line from the result, don't write newline
to the result file.

Split results from .test files into
.result files. Make each individual test a
small python program, which is executed from the context
of the main interpreter. This allows for easy access to
interpreter environment, such as the currently running
server.

Implement a pre-processor for .test files that replaces

exec admin <expr>
and
exec sql <expr>

with python syntax that actually sends string <expr>
to tarantool server connection (lib.admin.Connection), and
prints output to stdout (i.e. .reject file).

Implement stdout filters, for use in .test files:
this enables testing of statement that produce
run-dependent or host-dependent results.

Remove 'cmd' suite as unnecessary, args.test is moved
to box.suite. @todo: make results of the test host-independent.

Fix a bug in lib.admin.Connection (administrative connection)
when it would block and indefinitely wait for response for
some administrative commands.