Fix tests.sh support for running a single assembly and add argument passthrough so you can run a single test
Fix tests.sh support for running a single assembly and add argument passthrough so you can run a single test

shyamnamboodiripad/roslyn,agocke/roslyn,abock/roslyn,wvdd007/roslyn,bartdesmet/roslyn,AmadeusW/roslyn,brettfo/roslyn,jmarolf/roslyn,dotnet/roslyn,CyrusNajmabadi/roslyn,heejaechang/roslyn,KevinRansom/roslyn,aelij/roslyn,diryboy/roslyn,MichalStrehovsky/roslyn,AlekseyTs/roslyn,swaroop-sridhar/roslyn,stephentoub/roslyn,tmat/roslyn,eriawan/roslyn,heejaechang/roslyn,KirillOsenkov/roslyn,diryboy/roslyn,CyrusNajmabadi/roslyn,sharwell/roslyn,bartdesmet/roslyn,nguerrera/roslyn,physhi/roslyn,abock/roslyn,mgoertz-msft/roslyn,genlu/roslyn,dotnet/roslyn,panopticoncentral/roslyn,VSadov/roslyn,swaroop-sridhar/roslyn,sharwell/roslyn,jasonmalinowski/roslyn,aelij/roslyn,AlekseyTs/roslyn,gafter/roslyn,bartdesmet/roslyn,eriawan/roslyn,shyamnamboodiripad/roslyn,agocke/roslyn,mgoertz-msft/roslyn,MichalStrehovsky/roslyn,davkean/roslyn,reaction1989/roslyn,DustinCampbell/roslyn,shyamnamboodiripad/roslyn,jcouv/roslyn,weltkante/roslyn,xasx/roslyn,tmat/roslyn,AlekseyTs/roslyn,VSadov/roslyn,mavasani/roslyn,ErikSchierboom/roslyn,sharwell/roslyn,panopticoncentral/roslyn,tannergooding/roslyn,KevinRansom/roslyn,nguerrera/roslyn,jcouv/roslyn,KevinRansom/roslyn,tannergooding/roslyn,tannergooding/roslyn,brettfo/roslyn,weltkante/roslyn,AmadeusW/roslyn,xasx/roslyn,VSadov/roslyn,xasx/roslyn,panopticoncentral/roslyn,davkean/roslyn,genlu/roslyn,heejaechang/roslyn,KirillOsenkov/roslyn,jasonmalinowski/roslyn,KirillOsenkov/roslyn,weltkante/roslyn,abock/roslyn,DustinCampbell/roslyn,swaroop-sridhar/roslyn,agocke/roslyn,dotnet/roslyn,wvdd007/roslyn,ErikSchierboom/roslyn,mavasani/roslyn,DustinCampbell/roslyn,davkean/roslyn,stephentoub/roslyn,diryboy/roslyn,brettfo/roslyn,jasonmalinowski/roslyn,stephentoub/roslyn,gafter/roslyn,mavasani/roslyn,AmadeusW/roslyn,genlu/roslyn,jcouv/roslyn,reaction1989/roslyn,mgoertz-msft/roslyn,aelij/roslyn,ErikSchierboom/roslyn,wvdd007/roslyn,reaction1989/roslyn,eriawan/roslyn,physhi/roslyn,nguerrera/roslyn,gafter/roslyn,CyrusNajmabadi/roslyn,MichalStrehovsky/roslyn,physhi/roslyn,jmarolf/roslyn,jmarolf/roslyn,tmat/roslyn