Add some additional query options to the status updates list API.
Review Request #8552 — Created Nov. 22, 2016 and submitted
This change adds a few additional options to the status updates list API for
querying by the change description, service ID, or state.
Ran unit tests.
Tool: Pyflakes Processed Files: reviewboard/testing/testcase.py reviewboard/webapi/tests/test_status_update.py reviewboard/webapi/resources/status_update.py Tool: PEP8 Style Checker Processed Files: reviewboard/testing/testcase.py reviewboard/webapi/tests/test_status_update.py reviewboard/webapi/resources/status_update.py