rkt: removePod: fix switch order
rkt: removePod: fix switch order

p.isExitedGarbage and p.isExited can both be true at the same time. Fix
the tests order in the switch, so we don't move a pod to garbage if it
is already in garbage.

Fixes https://github.com/coreos/rkt/issues/1620

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