2. modify errmsg
3. rewrite Lua - check_type
4. Move try-except importerror to test_suite file

Move test files to new format of box_connection output (yaml-like). Move stat test to LUA. We may move reconfigure.test(??) and sql test to LUA, i suppose

Add first support of python backend for TT. Still need to add support of error code (now it return 0 everytime)

Implement tuple validation when building a new index.
This introduces such checks as for field type, presence of a field,
etc. in all tuples added to the new index.

Add error code ER_INDEX_ARITY, update tests.

Add a check that the primary key is always unique.

Test unique -> non-unique transition.

Debug index:alter().
Add tests for changes in index id, name, type, unique/not unique.
Make box.space[i].index[j] output yaml-parsable (- idx: index 0
parsing problem).

Cover basics of CREATE INDEX.
Add support for index names.
Maintain index names in Lua.

Fix memory leaks this test has revealed.

 * sys/prctl.h can be found only on Linux, but cmake recognizes Debian/kFreeBSD
 as Linux.
 * extern "C" for TIMEOUT_INFINITY (it is used in plugins)

https://blueprints.launchpad.net/tarantool/+spec/auto-init-storage

Add basic tests for space DDL, fix bugs the test coverage
has revealed.

Conflicts:
	test/box/net.box.result

Fix race condition in session.test.

Modify 'space' object contents when altering it, rather
than create a new Lua table.
In Lua, when saving a copy of a table in a local variable
a shallow copy is saved, in other words, table variables
initialized from each other share state.

Make use of this feature in the following scenario:

space = box.schema.create_space()
space:create_index() -- modifies box.space[id] which 'space' is a
shared ptr to
space.index[0] - great, space.index[0] has the added index.