CFY-800 add test for non recoverable errors
CFY-800 add test for recoverable errors specifying retry_after
CFY-800 for travis
Update .travis.yml
Merge pull request #57 from cloudify-cosmo/feature/CFY-800-non-recoverable-errors

Recoverable and non recoverable errors
Merge branch 'develop' into feature/CFY-647-add-support-for-passing-params-to-workflows