fix a potential py3 iterate with inline modification issue up front, even if the function in question should not be needed anymore.

git-svn-id: svn+ssh://svn.code.sf.net/p/migrid/code/trunk@6140 b75ad72c-e7d7-11dd-a971-7dbc132099af

Author: jonasbardino

mig/shared/useradm.py

@@ -2211,7 +2211,9 @@ def fix_userdb_keys(
                     unlock_user_db(flock)
                 raise Exception('Failed to load user DB: %s' % err)
 
-    for (client_id, user) in user_db.items():
+    # NOTE: force list copy here as we delete inline below
+    for client_id in list(user_db):
+        user = user_db[client_id]
         fill_distinguished_name(user)
         old_id = client_id
         new_id = user['distinguished_name']