SHIBUI-701 Added missed tooltip message

backend/src/main/resources/i18n/messages_en.properties

@@ -437,6 +437,7 @@ tooltip.metadata-provider-name=Metadata Provider Name
 tooltip.metadata-provider-type=Metadata Provider Type
 tooltip.xml-id=Identifier for logging, identification for command line reload, etc.
 tooltip.metadata-url=Identifier for logging, identification for command line reload, etc.
+tooltip.metadata-file=The absolute path to the local metadata file to be loaded.
 tooltip.init-from-backup=Flag indicating whether initialization should first attempt to load metadata from the backup file.  If true, foreground initialization will be performed by loading the backing file, and then a refresh from the remote HTTP server will be scheduled to execute in a background thread, after a configured delay. This can improve IdP startup times when the remote HTTP file is large in size.
 tooltip.backing-file=Specifies where the backing file is located. If the remote server is unavailable at startup, the backing file is loaded instead.
 tooltip.backup-file-init-refresh-delay=Delay duration after which to schedule next HTTP refresh when initialized from the backing file.