fleetctl: raise poll interval to 500ms
fleetctl: raise poll interval to 500ms

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