Remove || which causes `set -e` not to work
Merge pull request #98 from benmoss/fix-fold-ignoring-set-e

Remove || which causes `set -e` not to work
Cucumber 1.3.18 is out with a fix for ruby 2.2, so don’t allow it to fail anymore.
Allow failure for JRuby until travis-ci/travis-ci#3067 is solved.