Description of problem:

Missing ActivationKey related changes when display_fqdn_for_hosts is disabled.

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

6.15.0

How reproducible:

Steps to Reproduce:
1. Disable the setting display_fqdn_for_hosts in Satellite
2. Navigate to Content > Lifecycle > Activation Keys > Create/Select any AK
3. Move to Associations tab -> Content Hosts
4. Verify short-names are used and domain isn't appended

Actual results:

The FQDN is displayed.

Expected results:

Only the shortname is displayed.

DEV Tracker for https://issues.redhat.com/browse/SAT-21375
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2265480