python-jwt: bump to version 1.5.3
python-jwt: bump to version 1.5.3

mellenburg/dcos,GoelDeepak/dcos,mellenburg/dcos,kensipe/dcos,amitaekbote/dcos,mesosphere-mergebot/mergebot-test-dcos,kensipe/dcos,amitaekbote/dcos,mesosphere-mergebot/dcos,surdy/dcos,dcos/dcos,mesosphere-mergebot/mergebot-test-dcos,mellenburg/dcos,kensipe/dcos,dcos/dcos,GoelDeepak/dcos,mesosphere-mergebot/mergebot-test-dcos,GoelDeepak/dcos,surdy/dcos,mellenburg/dcos,kensipe/dcos,amitaekbote/dcos,mesosphere-mergebot/mergebot-test-dcos,mesosphere-mergebot/dcos,surdy/dcos,branden/dcos,branden/dcos,amitaekbote/dcos,dcos/dcos,mesosphere-mergebot/dcos,dcos/dcos,branden/dcos,surdy/dcos,GoelDeepak/dcos,mesosphere-mergebot/dcos,dcos/dcos,branden/dcos