Enable fast_finish

See http://about.travis-ci.org/blog/2013-11-27-fast-finishing-builds/
Undo fast_finish
Re-enable fast_finish
1.9+ blockless Struct#select returns an enumerator
Merge pull request #1282 from dmarcotte/struct-select-enum

Blockless Struct#select should return an enumerator
Adding spec for JRUBY-5946

 This  accompanies https://github.com/jruby/jruby/commit/2c8e31014402907549090ca19531bda149ef7e61
Merge jruby-1_7