Fixed an upgrade test to accommodate Mesos task state changes.
Fixed an upgrade test to accommodate Mesos task state changes.

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