fix: managementgroups model validation

[nschonni]

• Add "body" to response
• createGroupRequest -> createManagementGroupRequest

[openapi-sdkautomation]

SDK Automation [Logs] (Generated from 32f078b, Iteration 1)

Python: Azure/azure-sdk-for-python [Logs] [Diff]

• sdk/managementgroups/azure-mgmt-managementgroups [Logs]

Java: Azure/azure-sdk-for-java [Logs] [Diff]

• managementgroups/resource-manager/v2017_08_31_preview [Logs]
• managementgroups/resource-manager/v2017_11_01_preview [Logs]
• managementgroups/resource-manager/v2018_01_01_preview [Logs]
• managementgroups/resource-manager/v2018_03_01_preview [Logs]

Go: Azure/azure-sdk-for-go [Logs] [Diff]

• preview/resources/mgmt/2017-08-31-preview [Logs]
• preview/resources/mgmt/2017-11-01-preview [Logs]
• preview/resources/mgmt/2018-01-01-preview [Logs]
• preview/resources/mgmt/2018-03-01-preview [Logs]

JavaScript: Azure/azure-sdk-for-js [Logs] [Diff]

• @azure/arm-managementgroups [Logs]

[AutorestCI]

Automation for azure-sdk-for-python

Unable to detect any generation context from this PR.

[AutorestCI]

Automation for azure-sdk-for-java

Unable to detect any generation context from this PR.

[AutorestCI]

Automation for azure-sdk-for-go

Unable to detect any generation context from this PR.

[azuresdkci]

Can one of the admins verify this patch?

[erich-wang]

@nschonni , thank you for creating the PR. May I ask how do you find this issue? It seems our validation tool did not detect the issue.

@raych1 , @michaeljqzq to check whether it is a bug in validation tool.

[raych1]

@erich-wang , model validation would not be triggered if there's no swagger spec change in the PR. That's why the check pass this time.
Actually this PR provides the fix to some examples which would fail by the new change released in model validation tool.
Here's the example error raised by new version of model validation tool.

{ message:
   'Validating "examples" and "x-ms-examples" in  D:/git/github/oav/azure-rest-api-specs/specification/managementgroups/resource-manager/Microsoft.Management/preview/2018-01-01-preview/management.json:\n',
  level: '\u001b[32minfo\u001b[39m' }
{ code: 'REQUEST_VALIDATION_ERROR',
  id: 'OAV109',
  message:
   'Found errors in validating the request for x-ms-example "PutManagementGroup" in operation "ManagementGroups_CreateOrUpdate".:\nFound errors in validating the request for x-ms-example "PutManagementGroup" in operation "ManagementGroups_CreateOrUpdate".',
  innerErrors:
   [ { code: 'REQUIRED_PARAMETER_EXAMPLE_NOT_FOUND',
       id: 'OAV105',
       message:
        'In operation "ManagementGroups_CreateOrUpdate", parameter createManagementGroupRequest is required in the swagger spec but is not present in the provided example parameter values.',
       position: { line: 162, column: 11 },
       url:
        'D:/git/github/oav/azure-rest-api-specs/specification/managementgroups/resource-manager/Microsoft.Management/preview/2018-01-01-preview/management.json',
       title:
        '#/paths/~1providers~1Microsoft.Management~1managementGroups~1{groupId}/put/parameters/3',
       directives: {} } ],
  level: '\u001b[31merror\u001b[39m' }