tests: add GoroutineAssistant util
tests: add GoroutineAssistant util

coreos/rkt,tv42/rkt,intfrr/rkt,linki/rkt,jonboulle/rkt,iankronquist/rkt,Wilybald/rkt,matthaias/rkt,jasonchaffee/rkt,euank/rkt,kinvolk/rkt,achanda/rkt,intfrr/rkt,joshix/rkt,markllama/rkt,coreos/rkt,coreos/rkt,liugenping/rkt,adfernandes/rkt,squeed/rkt,shobhit85/rkt,ybubnov/rkt,intfrr/rkt,jjlakis/rkt,yifan-gu/rocket,cab105/rkt,il9ue/rkt,smarvin/rkt,chrisseto/rkt,s-urbaniak/rkt,tmrts/rkt,ChengTiesheng/rkt,dgonyeo/rkt,yifan-gu/rkt,liugenping/rkt,lee212/rkt,sstabellini/rkt,sinfomicien/rkt,smarvin/rkt,intelsdi-x/rkt,shobhit85/rkt,Wilybald/rkt,alban/rkt,rkt/rkt,ybubnov/rkt,sgotti/rkt,jonboulle/rkt,MattDees/rkt,chrisseto/rkt,alban/rkt,intelsdi-x/rkt,lee212/rkt,sgotti/rkt,jzelinskie/rkt,lee212/rkt,squeed/rkt,iaguis/rkt,iaguis/rkt,kbrwn/rkt,dalanlan/rkt,Yhgenomics/rkt,liugenping/rkt,tmrts/rkt,sstabellini/rkt,joshix/rkt,alban/rkt,ChengTiesheng/rkt,jjlakis/rkt,endocode/rkt,kinvolk/rkt,jjlakis/rkt,dalanlan/rkt,nhlfr/rkt,squeed/rkt,yifan-gu/rocket,linki/rkt,jzelinskie/rkt,tmrts/rkt,joshix/rkt,liubq919/rkt,marineam/rkt,adfernandes/rkt,luebken/rkt,mjg59/rkt,MattDees/rkt,jakon89/rkt,euank/rkt,cab105/rkt,lucasallan/rkt,matthaias/rkt,rkt/rkt,s-urbaniak/rkt,blixtra/rkt,Wilybald/rkt,achanda/rkt,mjg59/rkt,monstermunchkin/rkt,il9ue/rkt,mjg59/rkt,tv42/rkt,sgotti/rkt,smarvin/rkt,blixtra/rkt,monstermunchkin/rkt,dgonyeo/rkt,endocode/rkt,jasonchaffee/rkt,yifan-gu/rkt,MattDees/rkt,mike1729/rkt,monstermunchkin/rkt,lucasallan/rkt,kbrwn/rkt,Shashwatsh/rkt,krnowak/rkt,krnowak/rkt,tv42/rkt,Shashwatsh/rkt,marineam/rkt,shobhit85/rkt,dgonyeo/rkt,luebken/rkt,krnowak/rkt,alexhersh/rkt,ybubnov/rkt,luebken/rkt,mike1729/rkt,markllama/rkt,Yhgenomics/rkt,yifan-gu/rkt,alexhersh/rkt,matthaias/rkt,lucasallan/rkt,sinfomicien/rkt,liubq919/rkt,sinfomicien/rkt,akshaykarle/rkt,nhlfr/rkt,chrisseto/rkt,mike1729/rkt,alexhersh/rkt,Wilybald/rkt,cab105/rkt,rkt/rkt,il9ue/rkt,sstabellini/rkt,akshaykarle/rkt,Yhgenomics/rkt,iankronquist/rkt,lucasallan/rkt,s-urbaniak/rkt,intelsdi-x/rkt,yifan-gu/rocket,liubq919/rkt,dalanlan/rkt,kbrwn/rkt,kinvolk/rkt,akshaykarle/rkt,jakon89/rkt,iaguis/rkt,adfernandes/rkt,jzelinskie/rkt,rkt/rkt,jasonchaffee/rkt,Shashwatsh/rkt,jakon89/rkt,jonboulle/rkt,marineam/rkt,ChengTiesheng/rkt,achanda/rkt,euank/rkt,blixtra/rkt,markllama/rkt,kinvolk/rkt,endocode/rkt,joshix/rkt,nhlfr/rkt,linki/rkt,iankronquist/rkt