openstackclient fails to get image list when the image api endpoint
has 'v2' substring in the URL. Instead of checking whether the api
endpoint URL terminates with '/v2', the current logic is checking
whether 'v2' appears anywhere in the endpoint string.
This issue was discovered on a production setup where certain
server names had 'v2' in their names. For example, when a hostname
is gopher.dev20.com, the image list APIs fail.
This commit updates the unit test to reflect this scenario. Without
the change in openstackclient/api/image_v2.py, all the unit tests
fail.
Co-Authored-By: sergio.carvalho@workday.com
Change-Id: I26b85afd646938272dbabe8e045b337b7df58c7d
Closes-Bug: 1652827