tests: install go vet/cover for Semaphore
tests: install go vet/cover for Semaphore

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