Fixes problem with how the meta-data gathered using the cli_create_metadata method is carried through to the RESTful API (where it's used when creating/updating broker and model objects).  Previously, the meta-data entered by the user (if any) when this method was called didn't carry through to the RESTful request (and was lost).  As a result, only default values could be used for these model/broker-specific meta-data fields.  The changes in this commit fix that problem.