Right now ``` python system_tests/run_system_test.py --package monitoring ``` will run the tests (since monitoring is in the [list of modules](https://github.com/GoogleCloudPlatform/gcloud-python/blob/8a7eea820e1dcfeda387989612c2c8ea31a9dfbb/system_tests/run_system_test.py#L40)) but the script used by Travis [doesn't include](https://github.com/GoogleCloudPlatform/gcloud-python/blob/8a7eea820e1dcfeda387989612c2c8ea31a9dfbb/system_tests/attempt_system_tests.py#L32-L39) monitoring.