Clean up NSEC.rb and NSEC3.rb.
Add JRuby back to Travis config. Revert fix to verify failure; will restore change momentarily.
Fix range use that was causing test failure in JRuby.
Make an assert report errors more thoroughly.
Remove assert of $@, which is intended for use in rescue clause.
Merge pull request #39 from keithrbennett/fix-jruby-nsec

Fix JRuby test failure. clean up NSEC.rb and NSEC3.rb.