The output format when using --format value has changed
with the recent version of openstacksdk. To fix this use
--format json instead and parse the json output using
jq
This is to workaround this bug(?) in openstacksdk.
https://storyboard.openstack.org/#!/story/2006659
Change-Id: Ie196ce1144eea76b8cb081c4cfe434c157510ae9