Comment 0 for bug 1642030

add an command that is similar to nova's instance action list:

https://github.com/openstack/python-novaclient/blob/97435a62fe052905d07c3daf5d7ef868410c7cbd/novaclient/v2/contrib/instance_action.py#L84-L93

it's a list command that takes a server as a required parameter, so we may need to rethink the command structure.

additionally, it's a 'contrib' item, but one that has been available since v2.2 (nova is now at 2.20+)

another thing to think about is that the nova team is looking to no longer use 'contrib' features, and merge the existing ones into core: https://review.openstack.org/#/c/280726/