functional tests: test for exit code on TestVolumes
functional tests: test for exit code on TestVolumes

cab105/rkt,kinvolk/rkt,jjlakis/rkt,nhlfr/rkt,squeed/rkt,yifan-gu/rocket,kinvolk/rkt,nhlfr/rkt,jakon89/rkt,sstabellini/rkt,Wilybald/rkt,markllama/rkt,euank/rkt,coreos/rkt,yifan-gu/rocket,akshaykarle/rkt,joshix/rkt,dgonyeo/rkt,kinvolk/rkt,cab105/rkt,lucasallan/rkt,s-urbaniak/rkt,shobhit85/rkt,lucasallan/rkt,kinvolk/rkt,tmrts/rkt,jjlakis/rkt,shobhit85/rkt,yifan-gu/rkt,yifan-gu/rocket,joshix/rkt,intelsdi-x/rkt,Shashwatsh/rkt,euank/rkt,monstermunchkin/rkt,sgotti/rkt,sgotti/rkt,squeed/rkt,nhlfr/rkt,alban/rkt,coreos/rkt,matthaias/rkt,squeed/rkt,rkt/rkt,joshix/rkt,mike1729/rkt,ybubnov/rkt,jonboulle/rkt,ybubnov/rkt,alban/rkt,lucasallan/rkt,jakon89/rkt,euank/rkt,rkt/rkt,intelsdi-x/rkt,achanda/rkt,akshaykarle/rkt,achanda/rkt,matthaias/rkt,sstabellini/rkt,akshaykarle/rkt,yifan-gu/rkt,intelsdi-x/rkt,s-urbaniak/rkt,joshix/rkt,jjlakis/rkt,tmrts/rkt,mike1729/rkt,s-urbaniak/rkt,jonboulle/rkt,coreos/rkt,cab105/rkt,Shashwatsh/rkt,sstabellini/rkt,lucasallan/rkt,jakon89/rkt,rkt/rkt,tmrts/rkt,ybubnov/rkt,matthaias/rkt,dgonyeo/rkt,markllama/rkt,Wilybald/rkt,achanda/rkt,sgotti/rkt,alban/rkt,rkt/rkt,monstermunchkin/rkt,shobhit85/rkt,jonboulle/rkt,mike1729/rkt,Shashwatsh/rkt,monstermunchkin/rkt,Wilybald/rkt,Wilybald/rkt,yifan-gu/rkt,dgonyeo/rkt,markllama/rkt