For v3 volume, add show_version api test, url is error and not reachable

[wangzhiguang]

For v3 volume, I want to add api test for show_version method in tempest/lib/service/volume/v3/versions_client.py. The specific API code is:
@decorators.idempotent_id('77838fc4-b49b-4c64-9533-166762517369')
    def test_show_version(self):
        # NOTE: The version data is checked on service client side
        # with JSON-Schema validation. It is enough to just call
        # the API here.
        self.versions_client.show_version('v3')
When I go to execute nosetests -v tempest/api/volume/test_versions.py command,The result is fail. By looking at the error message, we found that the url with permissions was wrong.Please check the attachment for details

[Doug Schveninger (ds6901)]

confirm on my devstack.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/680790

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/680790
Committed: https://git.openstack.org/cgit/openstack/tempest/commit/?id=152f1054b5ed98dafe1333deba6b14a08d7ec03f
Submitter: Zuul
Branch: master

commit 152f1054b5ed98dafe1333deba6b14a08d7ec03f
Author: Doug Schveninger <email address hidden>
Date: Fri Sep 6 19:53:02 2019 -0500

    Address bug 1839794 on the Volume show version client

    Bug https://bugs.launchpad.net/tempest/+bug/1839794
    found out that the volume version_show client that
    was not used had a defect when builing the URL.
    Used the same direction that the compute version client
    did to strip off the version and project info and add
    back the version.[0] Also added a Volume v3 test using the
    client.

    [0] https://github.com/openstack/tempest/blob/master/tempest/lib/services/compute/versions_client.py#L40

    Change-Id: I9be99f5fc0eab3de125ce69415a0be65b1c4ad0d
    Closes-Bug: #1839794

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tempest 22.0.0 release.

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Martin Kopec <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/tempest/+/675801
Reason: due to the age of the review and the previous comment, in case this is still valid, feel free to restore