Not all resources implement ResourceBase

[matthchr]

Describe the current behavior
The resource manager schema implies that all resources implement resourceBase, which has tags and a few other properties. This is not correct though, there are multiple "kinds" of ARM resources and some of the (Proxy) don't have to support tags. See this for details.

Describe the improvement
The Swagger specifications seem to correctly encode this information, see for example the ASK AgentPool resource which doesn't support tags according to Swagger, but which incorrectly is marked as supporting tags according to the resource manager schema JSON document.

We should stop forcing all types to inherit these ResourceBase properties, as not all of them do.

[matthchr]

See Azure/azure-resource-manager-schemas#1850

[matthchr]

This is fixed by #2084, probably we can close this

[theunrepentantgeek]

Verified as fixed in #2323