Update some log calls for translation and lazyness

Update log calls to use _LI and friends.
Follow oslo.i18n recommendation to use "," instead of % so that
lazy evaluation of debug messages is possible.

For details about tagging, see http://docs.openstack.org/developer/oslo.i18n/guidelines.html#log-translation

Partial-Bug: #1379001

Change-Id: I4aff674555945e6097283770fe77abecfebd740e
Updated from global requirements

Change-Id: Id3543e912346b5a6113f631770515fa2fd1080fe
Merge "Update some log calls for translation and lazyness"