Cache reference data for content caculation
Cache reference data for content caculation

This represents a non-trivial amount of time for running tests as our
most expensive assemblies are calculated multiple times.  Cache the data
here for expediance.

AmadeusW/roslyn,mgoertz-msft/roslyn,AnthonyDGreen/roslyn,mattwar/roslyn,tmeschter/roslyn,OmarTawfik/roslyn,MattWindsor91/roslyn,MattWindsor91/roslyn,reaction1989/roslyn,sharwell/roslyn,nguerrera/roslyn,eriawan/roslyn,orthoxerox/roslyn,jeffanders/roslyn,MichalStrehovsky/roslyn,srivatsn/roslyn,cston/roslyn,AlekseyTs/roslyn,mavasani/roslyn,dpoeschl/roslyn,tmeschter/roslyn,brettfo/roslyn,shyamnamboodiripad/roslyn,swaroop-sridhar/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,kelltrick/roslyn,aelij/roslyn,CaptainHayashi/roslyn,sharwell/roslyn,tannergooding/roslyn,abock/roslyn,dotnet/roslyn,tvand7093/roslyn,srivatsn/roslyn,xasx/roslyn,genlu/roslyn,kelltrick/roslyn,jcouv/roslyn,robinsedlaczek/roslyn,weltkante/roslyn,jeffanders/roslyn,swaroop-sridhar/roslyn,OmarTawfik/roslyn,orthoxerox/roslyn,mattscheffer/roslyn,jamesqo/roslyn,davkean/roslyn,diryboy/roslyn,aelij/roslyn,physhi/roslyn,abock/roslyn,mmitche/roslyn,jamesqo/roslyn,paulvanbrenk/roslyn,jasonmalinowski/roslyn,AlekseyTs/roslyn,davkean/roslyn,Giftednewt/roslyn,bartdesmet/roslyn,agocke/roslyn,amcasey/roslyn,Hosch250/roslyn,stephentoub/roslyn,ErikSchierboom/roslyn,diryboy/roslyn,AlekseyTs/roslyn,khyperia/roslyn,jeffanders/roslyn,KevinRansom/roslyn,ErikSchierboom/roslyn,mgoertz-msft/roslyn,robinsedlaczek/roslyn,genlu/roslyn,reaction1989/roslyn,sharwell/roslyn,bkoelman/roslyn,davkean/roslyn,brettfo/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,mavasani/roslyn,jasonmalinowski/roslyn,zooba/roslyn,tvand7093/roslyn,dotnet/roslyn,stephentoub/roslyn,tvand7093/roslyn,tmat/roslyn,DustinCampbell/roslyn,orthoxerox/roslyn,nguerrera/roslyn,wvdd007/roslyn,akrisiun/roslyn,mattscheffer/roslyn,akrisiun/roslyn,drognanar/roslyn,gafter/roslyn,eriawan/roslyn,aelij/roslyn,xasx/roslyn,MichalStrehovsky/roslyn,shyamnamboodiripad/roslyn,jmarolf/roslyn,VSadov/roslyn,MichalStrehovsky/roslyn,DustinCampbell/roslyn,cston/roslyn,TyOverby/roslyn,KirillOsenkov/roslyn,VSadov/roslyn,bkoelman/roslyn,Giftednewt/roslyn,genlu/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,tannergooding/roslyn,KirillOsenkov/roslyn,MattWindsor91/roslyn,abock/roslyn,lorcanmooney/roslyn,jmarolf/roslyn,bartdesmet/roslyn,brettfo/roslyn,tmat/roslyn,swaroop-sridhar/roslyn,stephentoub/roslyn,physhi/roslyn,dotnet/roslyn,weltkante/roslyn,agocke/roslyn,kelltrick/roslyn,paulvanbrenk/roslyn,gafter/roslyn,zooba/roslyn,bkoelman/roslyn,shyamnamboodiripad/roslyn,Hosch250/roslyn,jcouv/roslyn,mavasani/roslyn,mmitche/roslyn,dpoeschl/roslyn,drognanar/roslyn,tmeschter/roslyn,panopticoncentral/roslyn,AnthonyDGreen/roslyn,srivatsn/roslyn,MattWindsor91/roslyn,khyperia/roslyn,heejaechang/roslyn,wvdd007/roslyn,paulvanbrenk/roslyn,panopticoncentral/roslyn,Giftednewt/roslyn,lorcanmooney/roslyn,jcouv/roslyn,jkotas/roslyn,ErikSchierboom/roslyn,amcasey/roslyn,zooba/roslyn,drognanar/roslyn,CyrusNajmabadi/roslyn,KevinRansom/roslyn,pdelvo/roslyn,gafter/roslyn,lorcanmooney/roslyn,jmarolf/roslyn,CaptainHayashi/roslyn,amcasey/roslyn,VSadov/roslyn,yeaicc/roslyn,mmitche/roslyn,pdelvo/roslyn,heejaechang/roslyn,AmadeusW/roslyn,jkotas/roslyn,jasonmalinowski/roslyn,KevinRansom/roslyn,yeaicc/roslyn,xasx/roslyn,tmat/roslyn,jkotas/roslyn,AnthonyDGreen/roslyn,diryboy/roslyn,cston/roslyn,TyOverby/roslyn,CaptainHayashi/roslyn,eriawan/roslyn,Hosch250/roslyn,panopticoncentral/roslyn,mattwar/roslyn,heejaechang/roslyn,reaction1989/roslyn,robinsedlaczek/roslyn,yeaicc/roslyn,bartdesmet/roslyn,dpoeschl/roslyn,akrisiun/roslyn,mattscheffer/roslyn,khyperia/roslyn,CyrusNajmabadi/roslyn,OmarTawfik/roslyn,nguerrera/roslyn,weltkante/roslyn,mattwar/roslyn,tannergooding/roslyn,DustinCampbell/roslyn,physhi/roslyn,AmadeusW/roslyn,pdelvo/roslyn,TyOverby/roslyn,KirillOsenkov/roslyn,jamesqo/roslyn,agocke/roslyn,CyrusNajmabadi/roslyn,mgoertz-msft/roslyn,wvdd007/roslyn