fix build

Author: Yanshu Zhao

src/ResourceManager/Network/Commands.Network.Test/Commands.Network.Test.csproj

@@ -43,7 +43,7 @@
     <RunCodeAnalysis>false</RunCodeAnalysis>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Microsoft.Azure.Management.Network, Version=19.6.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+    <Reference Include="Microsoft.Azure.Management.Network, Version=19.6.0.0">
       <HintPath>..\..\..\packages\Microsoft.Azure.Management.Network.19.6.0\lib\net452\Microsoft.Azure.Management.Network.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.Azure.Management.OperationalInsights, Version=0.18.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">