delete core/headers/CaseSensitiveHeadersTest.groovy test
Added simple tests to cover ResponseHeaderContainerTest
Merge branch 'REP-238' of github.com:rackerlabs/repose into REP-238
changed e.getCause to e when checking for exception instance
Merge branch 'REP-238' of github.com:rackerlabs/repose into REP-238
fixed atomic integer on burst tests....again