Pin pycodestyle version to 2.2.0
Pin pycodestyle version to 2.2.0

* 2.3.0 broke our builds: https://github.com/PyCQA/pycodestyle/issues/617

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