SQLCatalog_deferFullTextIndex: De-hardcode called method.

Both the dummy method_id and the actually-used grouping_method_id.

bt5/erp5_full_text_mroonga_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/SQLCatalog_deferFullTextIndex.py

 # This script is called to defer fulltext indexing in a lower priority.
-GROUP_METHOD_ID = context.getPath() + '/SQLCatalog_deferFullTextIndexActivity'
+METHOD_ID = script.id + 'Activity'
+GROUP_METHOD_ID = context.getPath() + '/' + METHOD_ID
 activateObject = context.getPortalObject().portal_activities.activateObject
 for document, root_document_path in zip(getPath, getRootDocumentPath):
-  activateObject(
-    document,
-    activity='SQLQueue',
-    priority=4,
-    node='same',
-    group_method_id=GROUP_METHOD_ID,
-    serialization_tag='full_text_' + root_document_path,
-  ).SQLCatalog_deferFullTextIndexActivity()
+  getattr(
+    activateObject(
+      document,
+      activity='SQLQueue',
+      priority=4,
+      node='same',
+      group_method_id=GROUP_METHOD_ID,
+      serialization_tag='full_text_' + root_document_path,
+    ),
+    METHOD_ID,
+  )()