JSONStringInstanceIdentifierCodec requires adding prefix for every node in patch. E.g. it fails to parse:

/ietf-interfaces:interfaces/interface[name='eth0']

According to https://tools.ietf.org/html/rfc7951#section-6.11 this is valid identifier because the data nodes "interfaces", "interface", and "name" are defined in the module ."ietf-interfaces"

Issue observed using recent code from stable/boron branch.