debug level logs should not be translated

According to the OpenStack translation policy available at
https://wiki.openstack.org/wiki/LoggingStandards debug messages
should not be translated. Like mentioned in several changes in
Nova by garyk this is to help prioritize log translation.

Change-Id: I43c5d4ecd2286f1a622b6822603ba62881a317a2
Merge "debug level logs should not be translated"