Fixed bug #67462 PDO_PGSQL::beginTransaction() wrongly throws exception when not in transaction
Added PGSQL_TEST_CONNSTR env var support for ext/pgsql tests
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Added PGSQL_TEST_CONNSTR env var support for ext/pgsql tests
  Fixed bug #67462 PDO_PGSQL::beginTransaction() wrongly throws exception when not in transaction