Move import down to correct group

The "from keystone.common import utils" import was located
in the third-party group, which is the incorrect import group.

This change moves it from the group of third part imports to the
correct local import group to be more consistent with the rest
of keystone and to follow the pep8 guidelines.

Change-Id: I1d7124e67cd5a522eeafceacf05ca4ffac9d8b68

keystone/token/controllers.py

@@ -15,13 +15,13 @@
 import datetime
 import sys
 
-from keystone.common import utils
 from keystoneclient.common import cms
 from oslo_serialization import jsonutils
 import six
 
 from keystone.common import controller
 from keystone.common import dependency
+from keystone.common import utils
 from keystone.common import wsgi
 import keystone.conf
 from keystone import exception