Add mocked get_services to test_client.login

Because the redirect after logging in checks the number of services a user has,
this now needs to be mocked.

Right now this means adding `mock_get_login` to any tests that need a login.
This must be one of the first mocks, so that it can be overridden by any use
of `mock_get_services`, for tests that specifically want to rely on a quantity
of mocked services, or their contents.

This is a bit fragile, but there’s already a TODO in the code to make it better
so ¯\_(ツ)_/¯

tests/conftest.py

@@ -398,11 +398,23 @@ def mock_get_no_api_keys(mocker):
 
 @pytest.fixture(scope='function')
 def mock_login(mocker, mock_get_user, mock_update_user):
+
     def _verify_code(user_id, code, code_type):
         return True, ''
-    return mocker.patch(
-        'app.user_api_client.check_verify_code',
-        side_effect=_verify_code)
+
+    def _no_services(user_id=None):
+        return {'data': []}
+
+    return (
+        mocker.patch(
+            'app.user_api_client.check_verify_code',
+            side_effect=_verify_code
+        ),
+        mocker.patch(
+            'app.notifications_api_client.get_services',
+            side_effect=_no_services
+        )
+    )
 
 
 @pytest.fixture(scope='function')