Clean up exception handling.
Clean up exception handling.

Catch missing oauth_consumer_key.
Reduce exception handler to just return status 500
since HTTPResponse is not handling other codes
correctly.

Signed-off-by: Steve Loranz <749f95e2748aaf836ea2a030a8b369f33fe35144@redhat.com>

henrysher/imagefactory,redhat-imaging/imagefactory,redhat-imaging/imagefactory,LalatenduMohanty/imagefactory,jmcabandara/imagefactory,henrysher/imagefactory,LalatenduMohanty/imagefactory,jmcabandara/imagefactory