not copy nuget package to build ouput inorder to save disk space (#4854)

.vsts-dotnet-ci.yml

@@ -61,8 +61,7 @@ jobs:
         _includeBenchmarkData: true
     innerLoop: true
     pool:
-      name: NetCorePublic-Pool
-      queue: buildpool.windows.10.amd64.vs2017.open
+      name: Hosted VS2017
 
 - template: /build/ci/job-template.yml
   parameters:

test/Directory.Build.props

@@ -23,6 +23,7 @@
     <VSTestLogger>trx</VSTestLogger>
     <VSTestResultsDirectory>$(OutputPath)</VSTestResultsDirectory>
     <AssemblyOriginatorKeyFile>$(ToolsDir)Test.snk</AssemblyOriginatorKeyFile>
+    <CopyLocalLockFileAssemblies>false</CopyLocalLockFileAssemblies>
   </PropertyGroup>
   
   <ItemGroup>