Don't use tasks to track completion of the pipe (#1204)
Don't use tasks to track completion of the pipe (#1204)

* Don't use tasks to track completion of the pipe

ericstj/corefxlab,VSadov/corefxlab,tarekgh/corefxlab,hanblee/corefxlab,whoisj/corefxlab,ericstj/corefxlab,Vedin/corefxlab,ericstj/corefxlab,whoisj/corefxlab,VSadov/corefxlab,Vedin/corefxlab,stephentoub/corefxlab,VSadov/corefxlab,VSadov/corefxlab,KrzysztofCwalina/corefxlab,tarekgh/corefxlab,stephentoub/corefxlab,adamsitnik/corefxlab,Vedin/corefxlab,dotnet/corefxlab,ericstj/corefxlab,benaadams/corefxlab,stephentoub/corefxlab,ahsonkhan/corefxlab,hanblee/corefxlab,ericstj/corefxlab,KrzysztofCwalina/corefxlab,joshfree/corefxlab,adamsitnik/corefxlab,Vedin/corefxlab,ericstj/corefxlab,dotnet/corefxlab,ahsonkhan/corefxlab,VSadov/corefxlab,joshfree/corefxlab,stephentoub/corefxlab,stephentoub/corefxlab,Vedin/corefxlab,Vedin/corefxlab,benaadams/corefxlab,VSadov/corefxlab,stephentoub/corefxlab