3dt: use latest 3dt
3dt: use latest 3dt

- persistent http connections bug
  https://github.com/dcos/3dt/pull/60
  DCOS-9446

- small bug fixes
  https://github.com/dcos/3dt/pull/61
  https://github.com/dcos/3dt/pull/58

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