[6.15.z] fix in test_permission

[Satellite-QE]

Cherrypick of PR: #13871

Problem Statement

#12989 swapped entities for target_sat.api but:

(Pdb) entities.ActivationKey
<class 'nailgun.entities.ActivationKey'>
(Pdb) target_sat.api.ActivationKey
<class 'robottelo.hosts.Satellite.api.<locals>.inject_config.<locals>.DecClass'>

which breaks the if condition in this test

Solution

Swapping back to entities, as it is still heavily used in that module. Deferring further changes to component evaluation

[Satellite-QE]

trigger: test-robottelo
pytest: tests/foreman/api/test_permission.py -k test_positive_check_update[2]

[pondrejk]

prt build 5473 passed