Fix nova instance-action-list output field and order

'instance-action-list' is not possible to identify the order
and time of the specified instance actions.
This patch fixes the sort of 'Start_time' and add field.

Change-Id: If9e6aaf8eb631819bf8e1c915cb1da64d6fcd2f4
Implements: blueprint instance-action-list-output
Merge "Fix nova instance-action-list output field and order"