Ensure CoreCLR Package version overwrite works correctly in test build

Author: wtgodbe

tests/dir.props

@@ -113,7 +113,7 @@
   <PropertyGroup Condition="'$(OverwriteCoreClrPackageVersion)' == 'true'">
     <VersionToRestore Condition="'$(StableVersion)' != ''">$(StableVersion)</VersionToRestore>
     <VersionToRestore Condition="'$(VersionToRestore)' == ''">$(PackageVersion)-$(PreReleaseLabel)-$(BuildNumberMajor)-$(BuildNumberMinor)</VersionToRestore>
-    <PackageVersionArg>/p:CoreClrPackageVersion=$(VersionToRestore)</PackageVersionArg>
+    <PackageVersionArg>/p:MicrosoftNETCoreRuntimeCoreCLRPackageVersion=$(VersionToRestore)</PackageVersionArg>
   </PropertyGroup>
 
   <!-- Which tests shall we build? Default: Priority 0 tests.