stage0/kvm: various minor cleanups
stage0/kvm: various minor cleanups

coreos/rkt,coreos/rkt,matthaias/rkt,monstermunchkin/rkt,endocode/rkt,jjlakis/rkt,jjlakis/rkt,liugenping/rkt,krnowak/rkt,joshix/rkt,intelsdi-x/rkt,jonboulle/rkt,il9ue/rkt,yifan-gu/rkt,markllama/rkt,mike1729/rkt,alban/rkt,cab105/rkt,squeed/rkt,jzelinskie/rkt,cab105/rkt,akshaykarle/rkt,tmrts/rkt,jzelinskie/rkt,jakon89/rkt,sstabellini/rkt,jakon89/rkt,Wilybald/rkt,achanda/rkt,Wilybald/rkt,sinfomicien/rkt,jasonchaffee/rkt,jasonchaffee/rkt,kbrwn/rkt,dgonyeo/rkt,lucasallan/rkt,liugenping/rkt,krnowak/rkt,kinvolk/rkt,endocode/rkt,squeed/rkt,sstabellini/rkt,yifan-gu/rkt,blixtra/rkt,achanda/rkt,mike1729/rkt,rkt/rkt,matthaias/rkt,jzelinskie/rkt,lucasallan/rkt,nhlfr/rkt,Wilybald/rkt,shobhit85/rkt,tmrts/rkt,yifan-gu/rkt,blixtra/rkt,sstabellini/rkt,sinfomicien/rkt,adfernandes/rkt,joshix/rkt,sinfomicien/rkt,adfernandes/rkt,lucasallan/rkt,achanda/rkt,endocode/rkt,dgonyeo/rkt,shobhit85/rkt,Shashwatsh/rkt,coreos/rkt,joshix/rkt,s-urbaniak/rkt,tmrts/rkt,jakon89/rkt,krnowak/rkt,sgotti/rkt,blixtra/rkt,markllama/rkt,sgotti/rkt,joshix/rkt,squeed/rkt,rkt/rkt,ybubnov/rkt,il9ue/rkt,il9ue/rkt,kinvolk/rkt,monstermunchkin/rkt,rkt/rkt,linki/rkt,markllama/rkt,alban/rkt,jonboulle/rkt,yifan-gu/rocket,ybubnov/rkt,kbrwn/rkt,lucasallan/rkt,intelsdi-x/rkt,linki/rkt,akshaykarle/rkt,kinvolk/rkt,nhlfr/rkt,Wilybald/rkt,matthaias/rkt,dgonyeo/rkt,Shashwatsh/rkt,cab105/rkt,kinvolk/rkt,Shashwatsh/rkt,akshaykarle/rkt,euank/rkt,s-urbaniak/rkt,sgotti/rkt,intelsdi-x/rkt,kbrwn/rkt,euank/rkt,s-urbaniak/rkt,adfernandes/rkt,liugenping/rkt,ybubnov/rkt,yifan-gu/rocket,shobhit85/rkt,alban/rkt,mike1729/rkt,jasonchaffee/rkt,nhlfr/rkt,monstermunchkin/rkt,yifan-gu/rocket,rkt/rkt,jonboulle/rkt,euank/rkt,linki/rkt,jjlakis/rkt