[DDC-2110] fixed problem with existing table columns (postgresql)
removed unnecessary select
new tests for PostgreSqlPlatform

- added test for getListTableColumnsSQL
- added test for getListTableForeignKeysSQL
- added test for getListTableIndexesSQL
[DBAL-510] Fix tests (remove SQL ones, add functional test.
Merge branch 'DBAL-510' into 2.3
fixed bug on schema comparitor, prevent multiple rename candidates for the same original field
Update syntax on comparitor bug
Add compare change columns test for multiple new columns rename
Update comparitor test to use assertCount
Remove trailing whitespace
Re-add the incorrectly removed line, remove whitespace
remove more whitespace
Merge branch 'DBAL-361' into 2.3
Fixed a PHP warning in DBALException::driverExceptionDuringQuery() when a parameter contains binary data.
Merge branch 'DBAL-490' into 2.3
[DBAL-412] Fix postgresql query
Merge branch 'DBAL-412' into 2.3
[DBAL-482] autoincrement + identity columns on SQLServer
[DBAL-453] Trim search parth entries.
Merge branch 'DBAL-453' into 2.3