[Datafactory] Add SecureInput property to Activity. Add recursive option to cancel API

[haricr]

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The initial PR has been merged into your service PR:
Azure/azure-sdk-for-python#2293

[azuresdkci]

Can one of the admins verify this patch?

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The initial PR has been merged into your service PR:
Azure/azure-sdk-for-node#3644

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Azure/azure-sdk-for-java#2136

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Azure/azure-sdk-for-go#2760

[hvermis]

@lmazuel Laurent has already reviewed this PR - Laurent, Hari split his PR into 2 part. He will submit the about variables separately.

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