Properly handle partial update of resource attributes in PATCH requests

For Resource objects (Device, Network, Interface) that are able to have attributes, attributes need to be properly handled.

We should be able to specify a dict of only attributes that we wish to change and have the API properly reconcile them on a PATCH request.

For PUT requests, everything is working as intended. For reference internally, a PATCH request is a an update with the `partial=True` flag set, where PUT is an update with `partial=False`.