Fix unit test project guid.
Fix unit test project guid.

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