backport bugfix to avoid fatal error in array_merge during generating the table creation SQL

Fixes #402 (https://github.com/doctrine/DoctrineBundle/issues/402) by connecting by default to 'template1' instead of the database with the same name as the user (Postgre default in case of no dbname).

2.5 included this fix in 1c9fe8df

Can't use short array in php < 5.4

Add a unit-test to verify that when statements throw exceptions, the logger still has stopQuery called.

fixed typo

getSQLForJoins - infinite recursion if join alias is not unique

[DBAL-1058] [2.4] Fix database names introspection for SQL Server