Remove django_pbs.

Not in scope for karaage. Need to fix django_pbs so it will run
standalone and/or redo as another package, e.g. karaage-pbs or
karaage-monitor.

This does not affect the karaage xmlrpc procedures for processing PBS
logs.

Change-Id: I03c929df81758754435a4abfaef9545c560885df
Make karaage less PBS centric.

Move files from karaage.pbsmoab to other more appropriate places.

Note we have to keep karaage.pbsmoab for now due to database migrations.

Change-Id: Ifa06f92ccbafc0e647a85be1a8fc060974814755