Hammer CLI

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1257090
Description of problem:
The user locale can be configured over the WebUI, but not over the API or hammer
Also listing the users details over the API does not include the locale field.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Use API to configure users locale to set it to "en"
2. Use Hammer to configure users locale to set it to "en"
3.

Actual results:
Missing locale settings in GET resource
Not possible update locale

Expected results:
All user settings can be retrieved and updated over the API and Hammer.

Additional info: