'Update a specific aggregate\'s extra specs.
This method returns HTTP 204 (no content) on success.'

@rest_utils.ajax(data_required=True)
def patch(self, request, aggregate_id):

    updated = request.DATA['updated']
    if request.DATA.get('removed'):
        for name in request.DATA.get('removed'):
            updated[name] = None
    api.nova.aggregate_set_metadata(request, aggregate_id, updated)
