Rename parent LDAPObject pkeys in child LDAPObject methods.

If the parent and child entries have the same attribute as primary
key (such as in the DNS schema), we need to rename the parent key
to prevent a param name conflict. It has no side effects, because
the primary key name is always taken from the LDAPObject params,
never from the method params.

ipalib/plugins/baseldap.py

@@ -232,7 +232,11 @@ class LDAPObject(Object):
             for key in parent_obj.get_ancestor_primary_keys():
                 yield key
             if parent_obj.primary_key:
-                yield parent_obj.primary_key.clone(query=True)
+                pkey = parent_obj.primary_key
+                yield pkey.__class__(
+                    parent_obj.name + pkey.name, required=True, query=True,
+                    cli_name=parent_obj.name, label=pkey.label
+                )
 
     def has_objectclass(self, classes, objectclass):
         oc = map(lambda x:x.lower(),classes)