Merge pull request #2302 from JaredKerim-Mozilla/1037118

    Use management commands rather than SQL in docs (bug #1037118)
Combine test_utils_.py with test_amo_utils.py (bug 1037132)
Merge pull request #2303 from mstriemer/combine-amo-utils-tests-1037132

Combine test_utils_.py with test_amo_utils.py (bug 1037132)
refactor iarc code, add missing descs (bug 1035408)