Remove previous docker container
Remove previous docker container

In addition to killing the previous docker container, we should remove it so we can re-use the name.
mavasani/roslyn,stephentoub/roslyn,AmadeusW/roslyn,mavasani/roslyn,shyamnamboodiripad/roslyn,jasonmalinowski/roslyn,dotnet/roslyn,jmarolf/roslyn,KevinRansom/roslyn,eriawan/roslyn,KevinRansom/roslyn,AlekseyTs/roslyn,KirillOsenkov/roslyn,genlu/roslyn,AlekseyTs/roslyn,reaction1989/roslyn,mgoertz-msft/roslyn,davkean/roslyn,KirillOsenkov/roslyn,weltkante/roslyn,dotnet/roslyn,ErikSchierboom/roslyn,genlu/roslyn,eriawan/roslyn,AmadeusW/roslyn,tannergooding/roslyn,reaction1989/roslyn,shyamnamboodiripad/roslyn,physhi/roslyn,weltkante/roslyn,stephentoub/roslyn,bartdesmet/roslyn,tmat/roslyn,gafter/roslyn,panopticoncentral/roslyn,mavasani/roslyn,wvdd007/roslyn,davkean/roslyn,bartdesmet/roslyn,KevinRansom/roslyn,aelij/roslyn,KirillOsenkov/roslyn,gafter/roslyn,jasonmalinowski/roslyn,physhi/roslyn,jasonmalinowski/roslyn,davkean/roslyn,sharwell/roslyn,aelij/roslyn,CyrusNajmabadi/roslyn,wvdd007/roslyn,gafter/roslyn,heejaechang/roslyn,AlekseyTs/roslyn,mgoertz-msft/roslyn,dotnet/roslyn,jmarolf/roslyn,CyrusNajmabadi/roslyn,tmat/roslyn,CyrusNajmabadi/roslyn,diryboy/roslyn,tannergooding/roslyn,panopticoncentral/roslyn,brettfo/roslyn,mgoertz-msft/roslyn,jmarolf/roslyn,bartdesmet/roslyn,brettfo/roslyn,aelij/roslyn,sharwell/roslyn,weltkante/roslyn,tmat/roslyn,diryboy/roslyn,brettfo/roslyn,shyamnamboodiripad/roslyn,heejaechang/roslyn,diryboy/roslyn,eriawan/roslyn,reaction1989/roslyn,stephentoub/roslyn,genlu/roslyn,tannergooding/roslyn,sharwell/roslyn,wvdd007/roslyn,ErikSchierboom/roslyn,physhi/roslyn,ErikSchierboom/roslyn,AmadeusW/roslyn,panopticoncentral/roslyn,heejaechang/roslyn