Fix status API tests to include the URL
Fix status API tests to include the URL

Some of the status API tests were not including the API URL due to
`sample_api_url` not being defined or missing the `webapi_test_template`
decorator. Methods that previously used a hardcoded URL in the docstring
now use the `webapi_test_template` decorator as well.

Testing Done:
Ran unit tests. Saw that the docstrings were correct.

Reviewed at https://reviews.reviewboard.org/r/8509/

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