Move auth decorators into a decorators module

The non-decorators will be broken out in the followup change

endpoints/gitlabtrigger.py

@@ -6,8 +6,8 @@ from flask_login import current_user
 import features
 
 from app import app, gitlab_trigger
+from auth.decorators import require_session_login
 from auth.permissions import AdministerRepositoryPermission
-from auth.process import require_session_login
 from data import model
 from endpoints.common import route_show_if
 from util.http import abort