Fixed wrong call to boot_dev variable
Testing in travis
Fixed and tested build in Travis-CI
Merge pull request #6939 from kaptk2/develop

Fixed undefined variable error and tested in travis-ci
fixing https://github.com/saltstack/salt/commit/61573b1394c8835e8dccc91db44eeb2f7e843bd0#commitcomment-3967806
Merge pull request #6949 from ranl/hosts

fix hosts file error in Travis