Always install devicemapper stuff for travis_worker::docker
Always install devicemapper stuff for travis_worker::docker

spurti-chopra/travis-cookbooks,travis-ci/travis-cookbooks,spurti-chopra/travis-cookbooks,ljharb/travis-cookbooks,travis-ci/travis-cookbooks,ljharb/travis-cookbooks,spurti-chopra/travis-cookbooks,ljharb/travis-cookbooks,travis-ci/travis-cookbooks