Fix the ceilometer trait-description-list command

command ceilometer trait-description-list is unavailable.

Change-Id: Ib6d03b11194d6a0bef190c815d948649ada6c260
Closes-Bug: #1284548
Updated from global requirements

Change-Id: Ic9daf3cd6130b034f60f3492e91c8e335226209a
Merge "Fix the ceilometer trait-description-list command"
Merge "Updated from global requirements"