migrated org.fcrepo.auth to org.fcrepo.auth.common to match project name
sends bad request instead of 500 for bad JSON data
cleaned up some warnings
Merge branch 'gregjan-package-rename'

* gregjan-package-rename:
  cleaned up some warnings
  sends bad request instead of 500 for bad JSON data
  migrated org.fcrepo.auth to org.fcrepo.auth.common to match project name