Fix reference version of Network .NET dll package version

Author: MikhailTryakhov

src/ResourceManager/Compute.ManagedService/Commands.Compute.ManagedService.Test/Commands.Compute.ManagedService.Test.csproj

@@ -51,7 +51,7 @@
     <Reference Include="Microsoft.Azure.Management.Compute">
       <HintPath>..\..\..\packages\Microsoft.Azure.Management.Compute.17.0.1\lib\net452\Microsoft.Azure.Management.Compute.dll</HintPath>
     </Reference>
-    <Reference Include="Microsoft.Azure.Management.Network, Version=15.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+    <Reference Include="Microsoft.Azure.Management.Network, Version=19.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\..\..\packages\Microsoft.Azure.Management.Network.19.6.1-preview\lib\net452\Microsoft.Azure.Management.Network.dll</HintPath>
       <Private>True</Private>
     </Reference>