I18n

Keystoneclient didn't provide translated messages. With this
change, the messages are marked for translation.

DocImpact

Implements: blueprint keystoneclient-i18n

Change-Id: I85263a71671a1dffed524185266e6bb7ae559630
Updated from global requirements

Change-Id: I52962d1bf30fef1491b66cc1a5cb3ea8c32d3c57
Merge "I18n"