Clean up unused uses
Merge pull request #678 from fejese/cleanup-uses

Clean up unused uses
DBAL-774 - added failing test for parsing order of joins with multiple on conditions
Added group annotation
fix parsing order of joins
Merge pull request #679 from deeky666/DBAL-774

[DBAL-774] Fix QueryBuilder parsing order of joins
Enabled placeholders for "in" method in ExpressionBuilder
Changed the composer constraint to allow Common 2.5
Merge pull request #684 from stof/patch-1

Changed the composer constraint to allow Common 2.5
add test for explicit positional parameter keys
Merge pull request #686 from deeky666/additional-test-sqlparserutil

Add test for explicit positional parameter keys in SQLParserUtils
Fixed expanding positional parameters which do not start from 0
Fixed closing a connection

The inner connection should be unreferenced, but the property should not be removed from the object
fix NULL / NOT NULL clause for column alterations in Oracle
Merge pull request #681 from hason/utils

Fixed expanding positional parameters which do not start from 0
Fixing default timezone for tests, as travis keeps failing due to travis-ci/travis-ci#2523
Add test case for #688
fix renaming column with default value on SQL Server
fix column comments containing string literal chars on SQL Server
Merge pull request #694 from deeky666/DBAL-1011

[DBAL-1011] Fix column comments containing string literal chars on SQL Server