systemd: preload unit hashes in NewSystemdUnitManager
systemd: preload unit hashes in NewSystemdUnitManager

mwitkow/fleet,hhoover/fleet,esatterwhite/fleet,flandr/fleet,WPMedia/fleet,webwlsong/fleet,mwhooker/fleet,coreos/fleet,giantswarm/fleet,paveltiunov/fleet,bcwaldon/fleet,coreos/fleet,mischief/fleet,flandr/fleet,bcwaldon/fleet,jonboulle/fleet,mwitkow-io/fleet,bcwaldon/fleet,endocode/fleet,ecnahc515/fleet,improbable-io/fleet,thepwagner/fleet,dongsupark/fleet,wuqixuan/fleet,improbable-io/fleet,mischief/fleet,mookjp/fleet,hhoover/fleet,dalbani/fleet,dalbani/fleet,wuqixuan/fleet,jonboulle/fleet,WPMedia/fleet,paveltiunov/fleet,mwhooker/fleet,octoblu/fleet,dalbani/fleet,ecnahc515/fleet,esatterwhite/fleet,coreos/fleet,webwlsong/fleet,giantswarm/fleet,improbable-io/fleet,mwitkow-io/fleet,jonboulle/fleet,bviswana101/fleet,octoblu/fleet,ecnahc515/fleet,giantswarm/fleet,endocode/fleet,thepwagner/fleet,dongsupark/fleet,mookjp/fleet,bviswana101/fleet,mwitkow/fleet,dongsupark/fleet,endocode/fleet