Fix bug 1163967 - DELETE request returns no content and 203 response.
Update RestServiceFilesIT to check header and response code informtaion. 
Fix RestResponseBuilder to return correct response code for no content.
Add new tests.
merge tjoneslo: Fix bug 1163967  - Update the delete processing for both the entity and the builder to return no body and a 204 (no content) status code.

https://code.launchpad.net/~tjoneslo/akiban-server/fix-bug-1163967/+merge/156904