juju destroy-controllers fails when using an Openstack with a self-signed certificate

[Heather Lanigan]

Found during work on: https://bugs.launchpad.net/juju/+bug/1777897

$ juju-dev-test-23-jul-19/juju destroy-controller --yes --destroy-all-models monday
ERROR
validateCloudSpec(): {Type:openstack Name:oscacert Region:RegionOne Endpoint:https://10.5.0.18:5000/v2.0 IdentityEndpoint: StorageEndpoint: Credential:0xc420417b80 CACertificates:[]}

ERROR
validateCloudSpec(): {Type:openstack Name:oscacert Region:RegionOne Endpoint:https://10.5.0.18:5000/v2.0 IdentityEndpoint: StorageEndpoint: Credential:0xc420417b80 CACertificates:[]}

ERROR
determineClient(0): ([])

Destroying controller
Waiting for hosted model resources to be reclaimed
All hosted models reclaimed, cleaning up controller machines
ERROR destroying controller model: destroying instances: failed to get list of server details
caused by: authentication failed
caused by: failed executing the request https://10.5.0.18:5000/v2.0/tokens
caused by: Post https://10.5.0.18:5000/v2.0/tokens: x509: certificate signed by unknown authority

[Heather Lanigan (hmlanigan)]

for develop: https://github.com/juju/juju/pull/8984

[Anastasia (anastasia-macmood)]

Marking as Won't Fix for 2.4 series since we are not planning to make any further releases in this series at this stage.