roles: make naming_context a @Property

Otherwise we use the ssh/ldap connection inside the constructor
which can cause troubles.

sssd_test_framework/roles/ad.py

@@ -63,11 +63,6 @@ def __init__(self, *args, **kwargs) -> None:
         Active Directory domain name.
         """
 
-        self.naming_context: str = self.host.naming_context
-        """
-        Active Directory naming context.
-        """
-
         self.realm: str = self.host.realm
         """
         Kerberos realm.
@@ -128,6 +123,15 @@ def test_example_autofs(client: Client, ad: AD, nfs: NFS):
                 }
         """
 
+    @property
+    def naming_context(self) -> str:
+        """
+        Active Directory naming context.
+
+        :rtype: str
+        """
+        return self.host.naming_context
+
     def fqn(self, name: str) -> str:
         """
         Return fully qualified name in form name@domain.

sssd_test_framework/roles/samba.py

@@ -59,11 +59,6 @@ def __init__(self, *args, **kwargs) -> None:
         Samba domain name.
         """
 
-        self.naming_context: str = self.host.naming_context
-        """
-        Samba naming context.
-        """
-
         self.realm: str = self.host.realm
         """
         Kerberos realm.
@@ -124,6 +119,15 @@ def test_example_autofs(client: Client, samba: Samba, nfs: NFS):
         # Set AD schema for automount
         self.automount.set_schema(self.automount.Schema.AD)
 
+    @property
+    def naming_context(self) -> str:
+        """
+        Samba naming context.
+
+        :rtype: str
+        """
+        return self.host.naming_context
+
     def fqn(self, name: str) -> str:
         """
         Return fully qualified name in form name@domain.