Installing some features in karaf causes JSON-encoded RESTCONF responses to be encoded in old format

The JSON format in RESTCONF has recently been updated: identifiers no longer contain namespace IDs when not required. But, installing some of the features causes the controller to switch to the old format. The features are:

odl-aaa-all
odl-openflow-nxm-extensions
odl-bgpcep-all
odl-lispflowmapping-all
odl-ttp-all
odl-sfc-all
odl-packetcable-all