REST response code HTTP_UNSUPPORTED_MEDIA_TYPE test
REST response code HTTP_UNSUPPORTED_MEDIA_TYPE test

Resolves openbmc/openbmc-test-automation#754

Change-Id: Ifd7bc87905261c88fb50ec2530b1dc464341dab8
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation