[ticket/17525] Fix tests

PHPBB-17525

phpBB/phpbb/db/tools/doctrine.php

@@ -62,7 +62,7 @@ class doctrine implements tools_interface
 	}
 
 	/**
-	 * @return Connection
+	 * {@inheritDoc}
 	 */
 	public function get_connection(): Connection
 	{

phpBB/phpbb/db/tools/tools_interface.php

@@ -226,4 +226,11 @@ interface tools_interface
 	 * @return void
 	 */
 	public function sql_truncate_table(string $table_name): void;
+
+	/**
+	 * Gets current Doctrine DBAL connection
+	 *
+	 * @return \Doctrine\DBAL\Connection
+	 */
+	public function get_connection(): \Doctrine\DBAL\Connection;
 }