[freeipa PR#696][synchronized] user.py: replace user_mod with ldap.update_entry()

[Tiboris]

   URL: https://github.com/freeipa/freeipa/pull/696
Author: Tiboris
 Title: #696: user.py: replace user_mod with ldap.update_entry()
Action: synchronized

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/696/head:pr696
git checkout pr696