Update couch_auth_cache to use new couch_event app
Update couch_auth_cache to use new couch_event app

smithsz/couchdb-couch,fkaempfer/couchdb,KlausTrainer/couchdb-couch,fkaempfer/couchdb,KlausTrainer/couchdb-couch,fkaempfer/couchdb,smithsz/couchdb-couch,cloudant/couchdb-couch,ngpestelos/couchdb-couch,cloudant/couchdb-couch,apache/couchdb-couch,apache/couchdb-couch,ngpestelos/couchdb-couch,fkaempfer/couchdb,fkaempfer/couchdb,KlausTrainer/couchdb-couch,fkaempfer/couchdb,alanning/couchdb-couch,alanning/couchdb-couch,alanning/couchdb-couch,ngpestelos/couchdb-couch,apache/couchdb-couch,smithsz/couchdb-couch,cloudant/couchdb-couch