Add a helper for sending a message on task failure
Add a helper for sending a message on task failure

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k/servo,zentner-kyle/servo,hyowon/servo,akosel/servo,mdibaiee/servo,peterjoel/servo,nerith/servo,jdramani/servo,szeged/servo,dati91/servo,pyfisch/servo,boghison/servo,mrobinson/servo,saneyuki/servo,michaelwu/servo,deokjinkim/servo,s142857/servo,brendandahl/servo,deokjinkim/servo,tempbottle/servo,bjwbell/servo,rentongzhang/servo,Adenilson/prototype-viewing-distance,nick-thompson/servo,juzer10/servo,wpgallih/servo,evilpie/servo,notriddle/servo,tschneidereit/servo,youprofit/servo,rnestler/servo,steveklabnik/servo,bjwbell/servo,froydnj/servo,larsbergstrom/servo,mrobinson/servo,WriterOfAlicrow/servo,kindersung/servo,rentongzhang/servo,eddyb/servo,AnthonyBroadCrawford/servo,brendandahl/servo,rixrix/servo,tschneidereit/servo,kindersung/servo,wpgallih/servo,luniv/servo,s142857/servo,upsuper/servo,codemac/servo,indykish/servo,seanmonstar/servo,s142857/servo,deokjinkim/servo,brendandahl/servo,Shraddha512/servo,pgonda/servo,dagnir/servo,michaelwu/servo,echochamber/servo,dvberkel/servo,saratang/servo,larsbergstrom/servo,mrobinson/servo,cbrewster/servo,hyowon/servo,splav/servo,jimberlage/servo,ConnorGBrewster/servo,luniv/servo,zhangjunlei26/servo,aweinstock314/servo,akosel/servo,boghison/servo,jgraham/servo,sadmansk/servo,notriddle/servo,snf/servo,KiChjang/servo,ruud-v-a/servo,nrc/servo,brendandahl/servo,mukilan/servo,SimonSapin/servo,tafia/servo,snf/servo,boghison/servo,canaltinova/servo,aidanhs/servo,aweinstock314/servo,rixrix/servo,pyecs/servo,bjwbell/servo,notriddle/servo,nnethercote/servo,sadmansk/servo,jdramani/servo,CJ8664/servo,g-k/servo,pgonda/servo,CJ8664/servo,WriterOfAlicrow/servo,rixrix/servo,emilio/servo,notriddle/servo,GyrosOfWar/servo,juzer10/servo,meh/servo,caldwell/servo,SimonSapin/servo,GreenRecycleBin/servo,jgraham/servo,anthgur/servo,indykish/servo,rnestler/servo,meh/servo,mattnenterprise/servo,bfrohs/servo,wartman4404/servo,dvberkel/servo,evilpie/servo,dsandeephegde/servo,echochamber/servo,dagnir/servo,rixrix/servo,ConnorGBrewster/servo,nnethercote/servo,paulrouget/servo,DominoTree/servo,RenaudParis/servo,caldwell/servo,jimberlage/servo,indykish/servo,GyrosOfWar/servo,anthgur/servo,zhangjunlei26/servo,bfrohs/servo,splav/servo,dmarcos/servo,meh/servo,mdibaiee/servo,szeged/servo,KiChjang/servo,pgonda/servo,rixrix/servo,akosel/servo,fiji-flo/servo,dati91/servo