DRY up error responses
DRY up error responses

mesosphere-mergebot/dcos,BenWhitehead/dcos,lingmann/dcos,BenWhitehead/dcos,surdy/dcos,dcos/dcos,kensipe/dcos,mellenburg/dcos,mesosphere-mergebot/mergebot-test-dcos,lingmann/dcos,mesosphere-mergebot/dcos,GoelDeepak/dcos,surdy/dcos,BenWhitehead/dcos,xinxian0458/dcos,mellenburg/dcos,dcos/dcos,branden/dcos,kensipe/dcos,mnaboka/dcos,amitaekbote/dcos,xinxian0458/dcos,jeid64/dcos,mnaboka/dcos,amitaekbote/dcos,jeid64/dcos,asridharan/dcos,mnaboka/dcos,darkonie/dcos,lingmann/dcos,mnaboka/dcos,asridharan/dcos,darkonie/dcos,mellenburg/dcos,mesosphere-mergebot/mergebot-test-dcos,mesosphere-mergebot/mergebot-test-dcos,kensipe/dcos,branden/dcos,branden/dcos,xinxian0458/dcos,surdy/dcos,amitaekbote/dcos,amitaekbote/dcos,GoelDeepak/dcos,vishnu2kmohan/dcos,jeid64/dcos,lingmann/dcos,mnaboka/dcos,surdy/dcos,branden/dcos,asridharan/dcos,dcos/dcos,kensipe/dcos,GoelDeepak/dcos,dcos/dcos,vishnu2kmohan/dcos,mesosphere-mergebot/mergebot-test-dcos,asridharan/dcos,mesosphere-mergebot/dcos,darkonie/dcos,xinxian0458/dcos,jeid64/dcos,darkonie/dcos,mesosphere-mergebot/dcos,GoelDeepak/dcos,BenWhitehead/dcos,vishnu2kmohan/dcos,vishnu2kmohan/dcos,mellenburg/dcos,dcos/dcos,darkonie/dcos