[PR #7538/938aec49 backport][stable-8] [keycloak_user_federation]: Adding option krbPrincipalAttribute (#7605)

[keycloak_user_federation]: Adding option krbPrincipalAttribute (#7538)

* keycloak_user_federation: Adding support for krbPrincipalAttribute

Signed-off-by: boolman <boolman@gmail.com>

* pr/7538 adding changelogs/fragment file

Signed-off-by: boolman <boolman@gmail.com>

* Update changelogs/fragments/7538-add-krbprincipalattribute-option.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/keycloak_user_federation.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/keycloak_user_federation.py

Co-authored-by: Felix Fontein <felix@fontein.de>

---------

Signed-off-by: boolman <boolman@gmail.com>
Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 938aec492e)

Co-authored-by: Boolman <boolman@gmail.com>

tests/unit/plugins/modules/test_keycloak_user_federation.py

@@ -326,6 +326,7 @@ class TestKeycloakUserFederation(ModuleTestCase):
                 'connectionPooling': True,
                 'pagination': True,
                 'allowKerberosAuthentication': False,
+                'krbPrincipalAttribute': 'krbPrincipalName',
                 'debug': False,
                 'useKerberosForPasswordAuthentication': False,
             },
@@ -374,6 +375,9 @@ class TestKeycloakUserFederation(ModuleTestCase):
                     "enabled": [
                         "true"
                     ],
+                    "krbPrincipalAttribute": [
+                        "krb5PrincipalName"
+                    ],
                     "usernameLDAPAttribute": [
                         "uid"
                     ],