Fixing responses for update management swagger

[finiteattractor]

This fix will allow SDK to through proper exception so we can see correct error in PS Cmdlets.

---

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• Except for special cases involving multiple contributors, the PR is started from a fork of the main repository, not a branch.
• If applicable, the PR references the bug/issue that it fixes.
• Swagger files are correctly named (e.g. the api-version in the path should match the api-version in the spec).

Quality of Swagger

• I have read the contribution guidelines.
• My spec meets the review criteria:
  • The spec conforms to the Swagger 2.0 specification.
  • The spec follows the guidelines described in the Swagger checklist document.
  • Validation tools were run on swagger spec(s) and have all been fixed in this PR.

[AutorestCI]

Automation for azure-libraries-for-java

Nothing to generate for azure-libraries-for-java

[AutorestCI]

Automation for azure-sdk-for-python

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-python#1959

[AutorestCI]

Automation for azure-sdk-for-node

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-node#2653

[AutorestCI]

Automation for azure-sdk-for-go

Encountered a Subprocess error: (azure-sdk-for-go)

Command: ['/usr/local/bin/autorest', '/tmp/tmpn75pog5s/rest/specification/automation/resource-manager/readme.md', '--go', '--go-sdk-folder=/tmp/tmpn75pog5s/src/github.com/Azure/azure-sdk-for-go', '--multiapi', '--use=@microsoft.azure/autorest.go@~2.1.98', '--use-onever', '--verbose']
Finished with return code 1
and output:

AutoRest code generation utility [version: 2.0.4262; node: v7.10.1]
(C) 2018 Microsoft Corporation.
https://aka.ms/autorest
   Loading AutoRest core      '/root/.autorest/@microsoft.azure_autorest-core@2.0.4275/node_modules/@microsoft.azure/autorest-core/dist' (2.0.4275)
   Loading AutoRest extension '@microsoft.azure/autorest.go' (~2.1.98->2.1.98)
   Loading AutoRest extension '@microsoft.azure/autorest.modeler' (2.3.38->2.3.38)
Processing batch task - {"tag":"package-2015-10"} .
Processing batch task - {"tag":"package-2017-05-preview"} .
Processing batch task - {"tag":"package-2018-01-preview"} .
FATAL: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: startIndex
   at System.String.LastIndexOf(Char value, Int32 startIndex, Int32 count)
   at AutoRest.Go.Model.CodeModelGo.PackageVerDir() in /opt/vsts/work/1/s/src/Model/CodeModelGo.cs:line 64
   at AutoRest.Go.Model.CodeModelGo.get_DefaultUserAgent() in /opt/vsts/work/1/s/src/Model/CodeModelGo.cs:line 83
   at AutoRest.Go.Model.CodeModelGo.get_UserAgent() in /opt/vsts/work/1/s/src/Model/CodeModelGo.cs:line 31
   at AutoRest.Go.Templates.VersionTemplate.<ExecuteAsync>d__1.MoveNext() in /opt/vsts/work/1/s/src/obj/Razor/Templates/VersionTemplate.cshtml:line 28
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at AutoRest.Core.CodeGenerator.<Write>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at AutoRest.Go.CodeGeneratorGo.<Generate>d__6.MoveNext() in /opt/vsts/work/1/s/src/CodeGeneratorGo.cs:line 91
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at AutoRest.Go.Program.<ProcessInternal>d__3.MoveNext() in /opt/vsts/work/1/s/src/Program.cs:line 107
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NewPlugin.<Process>d__15.MoveNext()
FATAL: go/generate - FAILED
FATAL: Error: Plugin go reported failure.
Process() cancelled due to exception : Plugin go reported failure.
Failure during batch task - {"tag":"package-2018-01-preview"} -- Error: Plugin go reported failure..
  Error: Plugin go reported failure.

[anuchandy]

@finiteattractor looks good, as you already know this is breaking change in the SDKs as this cause exception to be propagated instead of SDK runtime handling it.

[finiteattractor]

@anuchandy Thanks!, yes, this is the exact behavior we want.