[IotCentral] Update C# sdk, Change error to be CloudException, and re…

…move regex check for IOTC app (#10322)

* Update C# sdk, Change error to be CloudException, and remove regex check for IOTC app

* Update C# sdk, Change error to be CloudException, and remove regex check for IOTC app

* Update C# sdk, Change error to be CloudException, and remove regex check for IOTC app

Co-authored-by: Teng Lu <telu@microsoft.com>

eng/mgmt/mgmtmetadata/iotcentral_resource-manager.txt

@@ -3,12 +3,12 @@ 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/iotcentral/resource-manager/readme.md --csharp --version=latest --reflect-api-versions --csharp.output-folder=C:\Users\pochen\Github\azure-sdk-for-net\sdk\iotcentral\Microsoft.Azure.Management.IotCentral\src\Generated
-2020-01-02 19:34:34 UTC
+cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/iotcentral/resource-manager/readme.md --csharp --version=latest --reflect-api-versions --csharp.output-folder=D:\azure-sdk-for-net\sdk\iotcentral\Microsoft.Azure.Management.IotCentral\src\Generated
+2020-03-05 20:09:29 UTC
 Azure-rest-api-specs repository information
 GitHub fork: Azure
 Branch:      master
-Commit:      4676d9187988aa6793ff704aa39c5f495b40f6e0
+Commit:      57ba23526b8ef2ddd52165d54e20d66f5563e8f4
 AutoRest information
 Requested version: latest
-Bootstrapper version:    autorest@2.0.4407
+Bootstrapper version:    autorest@3.0.6187