Description of problem:

when we update the media following attributes are returned:

>>> media_update.keys()
[u'name', u'config_path', u'created_at', u'updated_at', u'media_path', u'path', u'os_family', u'id', u'image_path']

However, it should return all as below:
>>> media_get = entities.Media(server_config, id=media_create['id']).read_json()

>>> media_get.keys()
[u'organizations', u'name', u'created_at', u'updated_at', u'locations', u'os_family', u'operatingsystems', u'path', u'id']

Please note that Organizations, locations and operatingsystems are missing while update.


Version-Release number of selected component (if applicable):
sat6.1.2 snap1

How reproducible:
always

Steps to Reproduce:
1. Issue HTTP PUT request to https://sat.example.com/api/v2/medium/:id
2. check json payload
3.

Actual results:
Some of the attributes are missing when server returned attributes from  HTTP PUT request to https://sat.example.com/api/v2/medium/:id

Expected results:
should show all attributes

Additional info: