[zanata/zanata-parent] 7b7853: chore: use Docker builds for Travis, with caching

[GitHub]

  Branch: refs/heads/integration/master
  Home:   https://github.com/zanata/zanata-parent
  Commit: 7b7853357738b17b1b65845af9a9e6be6a6025d4
      https://github.com/zanata/zanata-parent/commit/7b7853357738b17b1b65845af9a9e6be6a6025d4
  Author: Sean Flanigan <sflaniga at redhat.com>
  Date:   2015-08-31 (Mon, 31 Aug 2015)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  chore: use Docker builds for Travis, with caching