Upgraded jetty version
Made changes that jetty 9 required in code
Jetty 9 normalizes Content-Type so these tests needed to be updated to reflect that
Jetty 9 allows bigger header sizes, after rigorous testing these are the numbers i came up with
Jetty 9 appears to remove headers that have no value or an empty string assigned to them, this test had to be updated for that
Merge pull request #968 from rackerlabs/REP-39

REP-39 Upgrade to Jetty 9.x