data factory validation activity

[cesher]

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[AutorestCI]

Automation for azure-sdk-for-ruby

Nothing to generate for azure-sdk-for-ruby

[AutorestCI]

Automation for azure-sdk-for-python

A PR has been created for you based on this PR content.

Once this PR will be merged, content will be added to your service PR:
Azure/azure-sdk-for-python#2293

[azuresdkci]

Can one of the admins verify this patch?

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Azure/azure-sdk-for-go#3843

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The initial PR has been merged into your service PR:
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[sarangan12]

I see that you have added 2 definitions ValidationActivity & ValidationActivityTypeProperties. Where are these definitions used?

[cesher]

My understanding is that these definitions are used by our tools to generate the SDKs. I am not aware of any place where these are supposed to be referenced. @hvermis am I missing something?