IPA: HBAC doesn't honour primary group membership for IPA user

Issue

• IPA: HBAC doesn't honor primary group membership for IPA user causing ipa hbactest and user login to fail.

# ipa hbactest --user=testuser --host=`hostname` --service=sshd
---------------------
Access granted: False
---------------------
  Not matched rules: testhbac

# id testuser
uid=1767400004(testuser) gid=1767400003(testgroup) groups=1767400003(testgroup) <---- Group is visible

# getent group testgroup
testgroup:*:1767400003:                      <---- Empty Output

# ipa group-show testgroup
  Group name: testgroup
  GID: 1767400003
  Member of HBAC rule: testhbac

# ipa hbacrule-show testhbac
  Rule name: testhbac
  Enabled: TRUE
  User Groups: testgroup
  Host Groups: testhostgroup
  Services: sshd