Add tests for the applications.new routes for adding a new member and updating a member

Add tests for creating and updating app member helper methods

tests/conftest.py

@@ -5,6 +5,7 @@ import alembic.command
 from logging.config import dictConfig
 from werkzeug.datastructures import FileStorage
 from collections import OrderedDict
+from unittest.mock import Mock
 
 from atst.app import make_app, make_config
 from atst.database import db as _db