[AKS] fix schema and example validation warnings

[mboersma]

Fixes these autorest warnings:

WARNING (DescriptionAndTitleMissing/R4000/SDKViolation): 'kubeconfigs' model/property lacks 'description' and 'title' property. Consider adding a 'description'/'title' element. Accurate description/title is essential for maintaining reference documentation.
    - file:///Users/matt/Projects/azure-rest-api-specs/specification/containerservices/resource-manager/Microsoft.ContainerService/stable/2018-03-31/managedClusters.json:1511:8 ($.definitions.CredentialResults.properties.kubeconfigs)

Apologies for the other whitespaces changes--that's VS Code's swagger plugin cleaning things up.

cc: @julienstroheker @zqingqing1

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[AutorestCI]

Automation for azure-sdk-for-js

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-js#816

[AutorestCI]

Automation for azure-sdk-for-python

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-python#4064

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Azure/azure-sdk-for-go#3831

[azuresdkci]

Can one of the admins verify this patch?

[anuchandy]

@mboersma thanks!.

There are couple of model (example) validation errors. Are we planning to fix them as part of this PR or should we create a work item to address this in future?

[mboersma]

There are couple of model (example) validation errors.

@anuchandy sure, I can fix those as well in this PR.

[mboersma]

@zqingqing1 I reworked the AAD and SP reset endpoint examples so they pass now. Could you check that this change looks correct?

[mboersma]

@anuchandy I reverted this PR to the original commit you reviewed, because @zqingqing1 is addressing the example validation errors in #4948.

[zqingqing1]

lgtm

[lmazuel]

@anuchandy merging the PR for Python work, let me know if you have concerns