HUM-232 remove async pendings with quorum success
HUM-232 remove async pendings with quorum success

This should help keep asyncs from piling up and persisting for
long periods of time.

creiht/hummingbird,troubling/hummingbird,redbo/hummingbird,troubling/hummingbird,corystone/hummingbird,nadeemsyed/hummingbird,nadeemsyed/hummingbird,creiht/hummingbird,redbo/hummingbird,corystone/hummingbird