Add test for response to email, when body is blank.
Add test for response to email, when body is blank.

xuewenfei/jobsworth,webstream-io/jobsworth,digitalnatives/jobsworth,ari/jobsworth,webstream-io/jobsworth,xuewenfei/jobsworth,rafaspinola/jobsworth,xuewenfei/jobsworth,ari/jobsworth,ari/jobsworth,webstream-io/jobsworth,rafaspinola/jobsworth,digitalnatives/jobsworth,rafaspinola/jobsworth,digitalnatives/jobsworth,webstream-io/jobsworth,ari/jobsworth,digitalnatives/jobsworth,xuewenfei/jobsworth,digitalnatives/jobsworth,rafaspinola/jobsworth