MANTA-1000 only invoke callback() once in postgersmgr.start()
MANTA-1000 only invoke callback() once in postgersmgr.start()

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