feat(scheduler): Attempt to reschedule only if a Job has no state
feat(scheduler): Attempt to reschedule only if a Job has no state

If an Agent has started to report state for a given Job, the scheduler
must not attempt to reschedule it to a new Machine.

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