Fix for waiting of tarantool starting/stopping. Bug with too many opened sockets or Exception
Fix for multiple similar patterns in unittest.find_tests
yaml-utf8-fix: fix libyaml erroneous representation of utf-8 data as
a binary stream. Fix box/cjson test.
yaml-utf8-fix: check that parser correctly recognizes a binary stream
yaml-null-conv: convert lua nil to NULL lightuserdata
for proper yaml null output. Fix test/box/socket test.
Merge remote-tracking branch 'origin/tt-multi-pattern-unit-fix'
Merge remote-tracking branch 'origin/tt-gdb-fix'
yaml-null-conv: review fixes

Add comment.
Fix style.
Update tests.
Merge branch 'yaml-null-conv'

Conflicts:
	test/box/suite.ini
Revert gdb test.
Move all tests to new preprocessor
Merge remote-tracking branch 'origin/master' into tt-lua-preprocessor

Conflicts:
	test/box/cjson.result
	test/box/cjson.test.lua