Fix failed Unit tests
Fix failed Unit tests

Due to [1][2] default auth_version change to 3.
This patch done the same changes in unit test.

[1] I917e273d3174adf0874e516b3d635ccb8ba58a27
[2] https://opendev.org/openstack/horizon/src/branch/master/openstack_dashboard/api/swift.py#L131

Change-Id: Ieb30da56109d485f592f94fefa3dd2d629651a6e

openstack/trove-dashboard,openstack/trove-dashboard,openstack/trove-dashboard,openstack/trove-dashboard