Fixup templates

Author: John Luo

src/ProjectTemplates/test/Infrastructure/GenerateTestProps.targets

@@ -15,7 +15,7 @@
     <!-- Targeting pack version should be the one we just built, if we're building it. Otherwise we use the baseline version -->
     <PropertyGroup>
       <MicrosoftAspNetCoreAppRefPackageVersion Condition="'$(IsTargetingPackBuilding)' != 'false'">%(_TargetingPackVersionInfo.PackageVersion)</MicrosoftAspNetCoreAppRefPackageVersion>
-      <MicrosoftAspNetCoreAppRefPackageVersion Condition="'$(IsTargetingPackBuilding)' == 'false'">$(AspNetCoreBaselineVersion)</MicrosoftAspNetCoreAppRefPackageVersion>
+      <MicrosoftAspNetCoreAppRefPackageVersion Condition="'$(IsTargetingPackBuilding)' == 'false'">$(TargetingPackVersionPrefix)</MicrosoftAspNetCoreAppRefPackageVersion>
     </PropertyGroup>
 
     <!-- Runtime and Ref packs may have separate versions. -->