Removed extinct code for Managing Downlink calls from the server (OBE and our new rich LWM2MClient Object Model)
Now check we get NOT_FOUND on deleting nonexistent object instances
Now test we can't execute on a write
Moved "broken-writer" resource into WriteTest, since it's not used by the other tests
Basic Observation Responsibility.
Made object registry
Merge branch 'stuff-sandbox' into object_model