Added custom key identifier

[mcardosos]

According to
https://msdn.microsoft.com/Library/Azure/Ad/Graph/api/entity-and-complex-type-reference#keycredential-type

This checklist is used to make sure that common issues in a pull request are addressed. This will expedite the process of getting your pull request merged and avoid extra work on your part to fix issues discovered during the review process.

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• 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).

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  • The spec conforms to the Swagger 2.0 specification.
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  • Validation tools were run on swagger spec(s) and have all been fixed in this PR.

[azuresdkciprbot]

Hi There,

I am the AutoRest Linter Azure bot. I am here to help. My task is to analyze the situation from the AutoRest linter perspective. Please review the below analysis result:

File: specification/graphrbac/data-plane/readme.md
Before the PR: Warning(s): 0 Error(s): 19
After the PR: Warning(s): 0 Error(s): 19

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Thanks for your co-operation.

[AutorestCI]

Did a commit to Azure/azure-sdk-for-go:
Azure/azure-sdk-for-go@add8926

[AutorestCI]

Did a commit to Azure/azure-sdk-for-python:
Azure/azure-sdk-for-python@147d1d6

[jhendrixMSFT]

The change looks good to me. Once @darshanhs90 or somebody else from the service teams approves I will merge.

[jhendrixMSFT]

Ping @darshanhs90

[darshanhs90]

Let me add one of the guys from the graph team to take a look at this,as they shall have more context about this

[darshanhs90]

@jmprieur Could you add any dev on your team to look at this PR?

[jhendrixMSFT]

Ping @jmprieur

[AutorestCI]

Automation for azure-sdk-for-python

A PR has been created for you:
Azure/azure-sdk-for-python#2013

[AutorestCI]

Automation for azure-sdk-for-go

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

Command: dep ensure
Finished with return code 127
and output:

/bin/sh: 1: dep: not found