Change oslo.utils to oslo_utils

The oslo.utils libraries are moving away from namespace packages.

This requires oslo.utils>=1.2.0

bp drop-namespace-packages

Change-Id: I803df61e91eabb96329d859aef6bea03530fb84f

glanceclient/openstack/common/apiclient/client.py

@@ -34,8 +34,8 @@ try:
 except ImportError:
     import json
 
-from oslo.utils import encodeutils
-from oslo.utils import importutils
+from oslo_utils import encodeutils
+from oslo_utils import importutils
 import requests
 
 from glanceclient.openstack.common._i18n import _