Added the ability to add user_of_subject to user_identities list

if user_of_subject is a member of the group with administrator
rights but it is not in /etc/groups.

(If a privileged group is assigned through the NSS.)
1 job for u_of_subject_to_u_identities in 2 minutes and 3 seconds
Status Name Job ID Coverage
  Test
passed build_stable #5946934

00:02:03