Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1371900

Description of problem:
The API of hsots and hostgroups returns for the puppet proxies the name fields. This is inconsistent with the other fields.

Steps to Reproduce:
1. GET hosts/1
2. GET hostgroups/1
3.

Actual results:
fields puppet_proxy_name and puppet_ca_proxy_name are not returned

Expected results:
fields puppet_proxy_name and puppet_ca_proxy_name are returned