Use 'KeyValueAppendAction' from osc-lib
Use 'KeyValueAppendAction' from osc-lib

Does what it says on the tin. This action was added to osc-lib in change
If73cab759fa09bddf1ff519923c5972c3b2052b1.

Change-Id: I51efaa096bb26e297d99634c5d9cca34c0919074
Signed-off-by: Stephen Finucane <492121341a95b3c3aab646bed44634f739dd019b@redhat.com>

openstack/python-openstackclient,openstack/python-openstackclient