- Use Data API for build requests: This is done.
 - Use DateTime Everywhere: This is done
 - Fix pep 8
 - Update doc: change brid to buildrequestid
 - Add test for "buildername" field
 - Remove path "/buildset/n:bsid/buildrequest" from BuildRequestsEndpoint
 - Fix bug with bsid for BuildRequestsEndpoint
   (it returned invalid query parameter. buildsetid must be used instead).
 - pep8