Update part of openstack.common.

Updated the gettextutils and log module in openstack.common.

Not update the openstack.common for the followings. We might need to
update those after we offically release grizzly.
- notifier: removed deprecated grizzly features.
- rpc: enable message envelop.

This is part of the blueprint gettext-i18n-issue.

Change-Id: Iac01c5d66f58518341d84da7948356fc4487d171
Merge "Update part of openstack.common."