Use User and Admin orm_adapter adapter in tests to support other ORMs (neo4j, in this case)

test/rails_app/app/controllers/users/omniauth_callbacks_controller.rb

@@ -6,7 +6,7 @@ class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
   end
 
   def sign_in_facebook
-    user = User.find_by_email('user@test.com')
+    user = UserAdapter.find_first(email: 'user@test.com')
     user.remember_me = true
     sign_in user
     render text: ""