Add conversion types in some strings

Some strings have no conversion types
for 'String Formatting Operations'.

Change-Id: I2c6176954643a93898ff2d06d686793fb0977458
Closes-Bug: #1289230
Sync log.py from oslo-incubator

This pulls in the latest version of log.py from oslo-incubator
which elminates the constant user_identity key error.

Note that this sync does a full sync, in other words it uses
the oslo update script and pulls in the log.py file and all
of the associated dependendencies for that module.

Current HEAD in OSLO:
--------------------
Merge: d9ea4f0 fd33d1e
Date:   Wed Mar 12 17:00:13 2014 +0000
Merge "Fix gettextutil.Message handling of deep copy failures"
--------------------

Change-Id: I7c9f8acd22787f9649a5a1e796238c7788a0484a
Fixes-Bug: 1290503
Merge "Sync log.py from oslo-incubator"
Merge "Add conversion types in some strings"