client.server_arrays.current_instances.index() returns incorrectly configured resources.. #6

When you call client.server_arrays.current_instances.index() on a given server array, you get back a list of Resources. Each Resource identifies itself as an Instance (good!), but sets its self.path to be /api/server_arrays/XXXX/current_instances which causes those Resources to not be fully functional. Their actions (run_executable, show tasks, etc) do not work at all.

I spent a few hours digging through the code and I'm not sure what the right way to fix this is. Sorry I don't have a patch... thoughts?