1) Temporary result files weren't deleted, if test's skipcond failed.
2) Vardir is removed when tests started.
3) Sort tests and test-suites by name
4) Added cleanup to box/lua.test

Conflicts:
	third_party/luajit

Conflicts:
	src/box/box_lua.cc
	test/box/lua.result
	third_party/luajit

Conflicts:
	.gitignore
	test/lib/test_suite.py
	test/unit/CMakeLists.txt
	third_party/luajit

Conflicts:
	third_party/luajit

Remove trailing spaces. Get rid of an unused method.

1. sleep(0.1) -> sleep(0.01)
2. _server -> serv, _replica -> _repl.

2. Refactor find_tests code
3. Rewrite and Add comment for chdir(base) (test_run.py:145)
4. Rewrite .gitignore file for new name of unit tests

Don't use palloc()/ptruncate() in box_lua.cc.
This is a pre-requisite patch for tuple-format.
tuple:transform() method remains to be fixed in a separate patch.

- make the test suite actually paste
- remove the ugly copy-paste

Use an existing method to pack a key into a tbuf.
@todo: switch to using a list of keys instead of a buffer
for expire.

- introduce primary_key_validate
- make asserts follow the coding style
- the original patch introduced a regression
in the error message when using a multi-part
key in update/delete: since, in the original patch,
key_validate was invoked before primary-key validation,
the error message changed to a less suitable one. Remove
this.
- an assert that something is not NULL is useless noise,
since a few lines down there's definitely going to be
NULL pointer dereference.

*Add uncommited file (lib/test-suite.py)

*Delete obsolete code

*Refactor of TestSuite and Test code

In the first place Tarantool has only one kind of test - functional testing.
But, when system began to grow, and each component (inside it) is needed to be tested thoroughly.

* 	Added support of UnitTest without creating of *.test file, that contains "run_test("*")"
	(Added UnitTest(Test) in the unittest_server.py, FuncTest(Test) in the tarantool_server.py.
	Now, when we search for tests we tell server to search them, and when we want to execute all
	tests TestSuite runs `execute` method of specific Test subclass)

* 	Fix of bug, that throwing OSError exception, when running by "python test-run.py",
	instead of "./test-run.py"

Rename tarantool_pthread.h to tt_pthread.h

This is a pre-requisite for addition of Perl stored procedures.