Migration to oslo.utils library

oslo.utils has been released with the modules excutils, importutils,
strutils and timeutils.

Changes done:
- Use the new oslo.utils modules when possible (not updated in the
nova.ironic driver and other oslo.incubator modules)
- importutils.import_module now is importutils.try_import
- Updated requirements.txt with the new library
- strutils.to_bytes now is strutils.string_to_bytes

Once the nova.ironic driver is migrated into nova tree, old references
and libraries can be cleaned (Bug: #1350269)

Closes-Bug: #1353540

Change-Id: Ic0af04ebd07b23eb94df32a6abf0e490d597f32a

ironic/drivers/modules/deploy_utils.py

@@ -20,10 +20,11 @@ import socket
 import stat
 import time
 
+from oslo.utils import excutils
+
 from ironic.common import disk_partitioner
 from ironic.common import exception
 from ironic.common import utils
-from ironic.openstack.common import excutils
 from ironic.openstack.common import log as logging
 from ironic.openstack.common import processutils
 

openstack-common.conf

@@ -9,18 +9,15 @@ module=excutils
 module=fileutils
 module=gettextutils
 module=imageutils
-module=importutils
 module=jsonutils
 module=local
 module=lockutils
 module=log
 module=loopingcall
-module=network_utils
 module=periodic_task
 module=policy
 module=processutils
 module=service
-module=strutils
 module=timeutils
 module=versionutils
 

requirements.txt

@@ -25,6 +25,7 @@ oslo.config>=1.4.0.0a3
 oslo.db>=0.2.0  # Apache-2.0
 oslo.rootwrap>=1.3.0.0a1
 oslo.i18n>=0.1.0  # Apache-2.0
+oslo.utils>=0.1.1  # Apache-2.0
 pecan>=0.5.0
 six>=1.7.0
 jsonpatch>=1.1