MANATEE-87 remove shard._currStandby on standby expiration
MANATEE-87 remove shard._currStandby on standby expiration

GrimDerp/manatee,joyent/manatee,josephglanville/manatee,AmlingPalantir/manatee,joyent/manatee,GrimDerp/manatee,AmlingPalantir/manatee,josephglanville/manatee