[ticket/17507] Fix notification related tests

PHPBB-17507

tests/test_framework/phpbb_database_test_case.php

@@ -213,6 +213,10 @@ abstract class phpbb_database_test_case extends TestCase
 
 				if ($has_default_identity || $add_primary_keys)
 				{
+					// Enable implicit identity insert on mssql
+					$sql = "SET IDENTITY_INSERT $key OFF";
+					$db->sql_query($sql);
+
 					// Add default identity column to columns list
 					if ($has_default_identity)
 					{