Updated Microsoft.Azure.Management.Resources version in Test csproj to 2.20

Author: dragonfly91

src/ResourceManager/RecoveryServices.Backup/Commands.RecoveryServices.Backup.Test/Commands.RecoveryServices.Backup.Test.csproj

@@ -44,7 +44,7 @@
       <HintPath>..\..\..\packages\Microsoft.Azure.Management.RecoveryServices.Backup.0.1.0-preview\lib\net40\Microsoft.Azure.Management.RecoveryServices.Backup.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.Azure.ResourceManager">
-      <HintPath>..\..\..\packages\Microsoft.Azure.Management.Resources.2.19.0-preview\lib\net40\Microsoft.Azure.ResourceManager.dll</HintPath>
+      <HintPath>..\..\..\packages\Microsoft.Azure.Management.Resources.2.20.0-preview\lib\net40\Microsoft.Azure.ResourceManager.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.Azure.Test.Framework, Version=1.0.5799.28345, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>