HOTFIX - (ADF) suppress exceptions during deserialization

[bgold09]

This change ensures that during JSON deserialization, any exceptions are suppressed so as not to break Get/List calls. We should assume that the service sends back valid JSON and not throw.

This fix is needed in POSH as well. I will send a PR for that once this is merged and a new nuget is pushed.

I will add logging later to ensure that we can capture stack traces, etc. for any such serialization issues.

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