Fix hipchat.send_message when using API v2
Fix hipchat.send_message when using API v2

hipchat.send_message fails with
{u'error': {u'message': u'Invalid content type: None', u'code': 400, u'type': u'Bad Request'}}
when using v2

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt