pylint: enable the import-error check

Check for import errors with pylint to make sure new python package
dependencies are not overlooked.

https://fedorahosted.org/freeipa/ticket/6418

Reviewed-By: Petr Spacek <pspacek@redhat.com>
Reviewed-By: Martin Basti <mbasti@redhat.com>

ipaserver/install/ipa_restore.py

@@ -25,7 +25,9 @@ import pwd
 import ldif
 import itertools
 
+# pylint: disable=import-error
 from six.moves.configparser import SafeConfigParser
+# pylint: enable=import-error
 
 from ipalib import api, errors
 from ipalib.constants import FQDN