Check VSIX certificates
Check VSIX certificates

Adds checks to the batch signing tool:

1. VSIX should be signed with VSIX certificates.
2. Non-VSIX should not be sigend with VSIX certificates.

A mistake of this nature previously broke signed builds.

jkotas/roslyn,jasonmalinowski/roslyn,zooba/roslyn,ErikSchierboom/roslyn,swaroop-sridhar/roslyn,amcasey/roslyn,AlekseyTs/roslyn,lorcanmooney/roslyn,aelij/roslyn,genlu/roslyn,TyOverby/roslyn,stephentoub/roslyn,jamesqo/roslyn,OmarTawfik/roslyn,bkoelman/roslyn,jasonmalinowski/roslyn,Shiney/roslyn,abock/roslyn,brettfo/roslyn,orthoxerox/roslyn,mavasani/roslyn,tmeschter/roslyn,xasx/roslyn,heejaechang/roslyn,KiloBravoLima/roslyn,AmadeusW/roslyn,bartdesmet/roslyn,budcribar/roslyn,jeffanders/roslyn,CaptainHayashi/roslyn,drognanar/roslyn,AlekseyTs/roslyn,VSadov/roslyn,Pvlerick/roslyn,mavasani/roslyn,shyamnamboodiripad/roslyn,Pvlerick/roslyn,xoofx/roslyn,orthoxerox/roslyn,agocke/roslyn,leppie/roslyn,wvdd007/roslyn,budcribar/roslyn,abock/roslyn,jasonmalinowski/roslyn,swaroop-sridhar/roslyn,jeffanders/roslyn,jamesqo/roslyn,mattwar/roslyn,VSadov/roslyn,MatthieuMEZIL/roslyn,davkean/roslyn,Hosch250/roslyn,yeaicc/roslyn,Hosch250/roslyn,mavasani/roslyn,khyperia/roslyn,tvand7093/roslyn,natidea/roslyn,lorcanmooney/roslyn,wvdd007/roslyn,mattscheffer/roslyn,sharwell/roslyn,jeffanders/roslyn,jcouv/roslyn,paulvanbrenk/roslyn,tmat/roslyn,gafter/roslyn,davkean/roslyn,tmeschter/roslyn,balajikris/roslyn,tannergooding/roslyn,bkoelman/roslyn,abock/roslyn,tvand7093/roslyn,bbarry/roslyn,Hosch250/roslyn,ErikSchierboom/roslyn,VSadov/roslyn,weltkante/roslyn,robinsedlaczek/roslyn,aelij/roslyn,gafter/roslyn,gafter/roslyn,KirillOsenkov/roslyn,sharwell/roslyn,tmat/roslyn,mattwar/roslyn,panopticoncentral/roslyn,MichalStrehovsky/roslyn,agocke/roslyn,physhi/roslyn,stephentoub/roslyn,ljw1004/roslyn,tmeschter/roslyn,mgoertz-msft/roslyn,Pvlerick/roslyn,jmarolf/roslyn,CaptainHayashi/roslyn,jmarolf/roslyn,TyOverby/roslyn,cston/roslyn,vslsnap/roslyn,agocke/roslyn,leppie/roslyn,cston/roslyn,natidea/roslyn,jkotas/roslyn,pdelvo/roslyn,bartdesmet/roslyn,bartdesmet/roslyn,KevinH-MS/roslyn,DustinCampbell/roslyn,kelltrick/roslyn,swaroop-sridhar/roslyn,MichalStrehovsky/roslyn,xoofx/roslyn,xasx/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,AnthonyDGreen/roslyn,khyperia/roslyn,KiloBravoLima/roslyn,lorcanmooney/roslyn,leppie/roslyn,kelltrick/roslyn,genlu/roslyn,drognanar/roslyn,reaction1989/roslyn,CyrusNajmabadi/roslyn,nguerrera/roslyn,weltkante/roslyn,heejaechang/roslyn,a-ctor/roslyn,OmarTawfik/roslyn,mattscheffer/roslyn,wvdd007/roslyn,bbarry/roslyn,shyamnamboodiripad/roslyn,jcouv/roslyn,amcasey/roslyn,xasx/roslyn,dotnet/roslyn,KevinH-MS/roslyn,orthoxerox/roslyn,KevinRansom/roslyn,AmadeusW/roslyn,MattWindsor91/roslyn,diryboy/roslyn,akrisiun/roslyn,dpoeschl/roslyn,dpoeschl/roslyn,Giftednewt/roslyn,sharwell/roslyn,AnthonyDGreen/roslyn,MatthieuMEZIL/roslyn,cston/roslyn,KirillOsenkov/roslyn,AArnott/roslyn,nguerrera/roslyn,vslsnap/roslyn,bbarry/roslyn,jhendrixMSFT/roslyn,mmitche/roslyn,KirillOsenkov/roslyn,paulvanbrenk/roslyn,CaptainHayashi/roslyn,dpoeschl/roslyn,diryboy/roslyn,yeaicc/roslyn,amcasey/roslyn,AmadeusW/roslyn,brettfo/roslyn,AArnott/roslyn,weltkante/roslyn,zooba/roslyn,MatthieuMEZIL/roslyn,pdelvo/roslyn,diryboy/roslyn,yeaicc/roslyn,CyrusNajmabadi/roslyn,zooba/roslyn,Giftednewt/roslyn,ErikSchierboom/roslyn,heejaechang/roslyn,tvand7093/roslyn,dotnet/roslyn,CyrusNajmabadi/roslyn,genlu/roslyn,MattWindsor91/roslyn,budcribar/roslyn,KevinRansom/roslyn,natidea/roslyn,KevinRansom/roslyn,robinsedlaczek/roslyn,Shiney/roslyn,paulvanbrenk/roslyn,jcouv/roslyn,AlekseyTs/roslyn,AArnott/roslyn,jkotas/roslyn,ljw1004/roslyn,reaction1989/roslyn,bkoelman/roslyn,stephentoub/roslyn,shyamnamboodiripad/roslyn,eriawan/roslyn,Shiney/roslyn,ljw1004/roslyn,MattWindsor91/roslyn,KevinH-MS/roslyn,Giftednewt/roslyn,tannergooding/roslyn,davkean/roslyn,a-ctor/roslyn,mmitche/roslyn,eriawan/roslyn,OmarTawfik/roslyn,physhi/roslyn,drognanar/roslyn,TyOverby/roslyn,mgoertz-msft/roslyn,xoofx/roslyn,mattscheffer/roslyn,balajikris/roslyn,DustinCampbell/roslyn,reaction1989/roslyn,pdelvo/roslyn,jamesqo/roslyn,brettfo/roslyn,mmitche/roslyn,mgoertz-msft/roslyn,akrisiun/roslyn,KiloBravoLima/roslyn,balajikris/roslyn,MattWindsor91/roslyn,aelij/roslyn,a-ctor/roslyn,robinsedlaczek/roslyn,jhendrixMSFT/roslyn,kelltrick/roslyn,srivatsn/roslyn,AnthonyDGreen/roslyn,khyperia/roslyn,akrisiun/roslyn,panopticoncentral/roslyn,jmarolf/roslyn,DustinCampbell/roslyn,srivatsn/roslyn,nguerrera/roslyn,vslsnap/roslyn,MichalStrehovsky/roslyn,eriawan/roslyn,tannergooding/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,tmat/roslyn,mattwar/roslyn,physhi/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,dotnet/roslyn,panopticoncentral/roslyn,jhendrixMSFT/roslyn,srivatsn/roslyn