fix/zend-db-adapter-driver-pdo for Sqlsrv

Since the Sqlsrv driver does not allow quoting, the PDO one needs to be used. Because of this, the Platform\Sqlsrv object cannot be created due to a naming discrepancy between the Driver\Sqlsrv\Sqlsrv::getDatabasePlatformName() and the Driver\Pdo\Pdo::getDatabasePlatformName() return value (first one would return SqlServer and the second one Sqlsrv).