Standardize import format

According to the rule in
http://docs.openstack.org/developer/hacking/#imports
I modify some irregular import format.

Change-Id: Ibf29ccaf3ddec4a956334cc3368ebee7a66e282c

openstackclient/api/object_store_v1.py

@@ -17,11 +17,10 @@ import io
 import logging
 import os
 
+from osc_lib import utils
 import six
 from six.moves import urllib
 
-from osc_lib import utils
-
 from openstackclient.api import api