Add flag to not reboot after OS upgrade
Add flag to not reboot after OS upgrade

rancher/os,SvenDowideit/os,rancherio/os,gizmotronic/os,datawolf/os,luxas/os,fentas/os,OnePaaS/os,maxfierke/rancher-os,luxas/os,maxfierke/rancher-os,rowhit/os,duguhaotian/os,OnePaaS/os,duguhaotian/os,imikushin/os,hairyhenderson/rancheros,datawolf/os,1yvT0s/os,juliengk/os,gpndata/os,juliengk/os,arnononline/os,hairyhenderson/rancheros,gpndata/os,1yvT0s/os,rowhit/os,rowhit/os,gizmotronic/os,hairyhenderson/rancheros,gpndata/os,ibuildthecloud/os,ibuildthecloud/os,fentas/os,rancherio/os,SvenDowideit/os,fentas/os,datawolf/os,maxfierke/rancher-os,luxas/os,imikushin/os,1yvT0s/os,rancherio/os,arnononline/os,arnononline/os,OnePaaS/os,rancher/os,duguhaotian/os