Generate new .NET SDK based on #9377 (#12364)

* Generate new .NET SDK based on #9377

* Update package version

eng/mgmt/mgmtmetadata/signalr_resource-manager.txt

@@ -1,14 +1,14 @@
-Installing AutoRest version: latest
+Installing AutoRest version: v2
 AutoRest installed successfully.
 Commencing code generation
 Generating CSharp code
 Executing AutoRest command
-cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/signalr/resource-manager/readme.md --csharp --version=latest --reflect-api-versions --csharp-sdks-folder=D:\workspace\github\juniwang\azure-sdk-for-net\sdk
-2019-08-19 07:46:30 UTC
+cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/signalr/resource-manager/readme.md --csharp --version=v2 --reflect-api-versions --csharp-sdks-folder=D:\workspace\github\juniwang\azure-sdk-for-net\sdk
+2020-05-29 05:23:38 UTC
 Azure-rest-api-specs repository information
 GitHub fork: Azure
 Branch:      master
-Commit:      59c5761efb6dae1a0cfb624bc1a054e902a855cf
+Commit:      5dd684b32ab297eb1b3a9bb00c432ede348eaddb
 AutoRest information
-Requested version: latest
+Requested version: v2
 Bootstrapper version:    [email protected]

sdk/signalr/Microsoft.Azure.Management.SignalR/AzSdk.RP.props

@@ -1,7 +1,7 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <!--This file and it's contents are updated at build time moving or editing might result in build failure. Take due deligence while editing this file-->
   <PropertyGroup>
-    <AzureApiTag>SignalRService_2018-10-01;</AzureApiTag>
+    <AzureApiTag>SignalRService_2020-05-01;</AzureApiTag>
     <PackageTags>$(PackageTags);$(CommonTags);$(AzureApiTag);</PackageTags>
   </PropertyGroup>
 </Project>