Fixing the build on JRuby 1.6.0 - this brings it down to 2 failures

Created by: kaiwren

I've chosen to mark doesn't hang when file exists in base_formatter_spec.rb pending rather than filter it with :ruby => "!jruby" because it isn't something that will never work on JRuby. Once http://jira.codehaus.org/browse/JRUBY-5634 makes it into a release we should be able to remove that pending directive.