RbdTestCase.test_cache_base_dir_exists is duplicated in test_imagebackend

[Dmitry Borodaenko]

RbdTestCase in nova/tests/virt/libvirt/test_imagebackend.py now has two slightly different versions of the same test case:
https://github.com/openstack/nova/blob/dc8de426066969a3f0624fdc2a7b29371a2d55bf/nova/tests/virt/libvirt/test_imagebackend.py#L759
https://github.com/openstack/nova/blob/dc8de426066969a3f0624fdc2a7b29371a2d55bf/nova/tests/virt/libvirt/test_imagebackend.py#L806

The redundant version was added in:
https://review.openstack.org/82840

I think it should be removed, it doesn't do anything the original test case doesn't already have.

[Matt Riedemann (mriedem)]

https://review.openstack.org/#/c/85187/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/85187
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2634616e3d94b57600090f3262c96e2233a521f8
Submitter: Jenkins
Branch: master

commit 2634616e3d94b57600090f3262c96e2233a521f8
Author: Dmitry Borodaenko <email address hidden>
Date: Thu Apr 3 14:54:03 2014 -0700

    remove redundant copy of test_cache_base_dir_exists

    Second copy of RbdTestCase.test_cache_base_dir_exists was accidentally
    introduced in https://review.openstack.org/82840.

    Change-Id: I16b2e472b2499f01379fdca9c860da0b95e291d8
    Closes-bug: #1302211
    Signed-off-by: Dmitry Borodaenko <email address hidden>

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/85744

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/85744
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=576d5a90a7521d56080e14a91d162164c45e3aa4
Submitter: Jenkins
Branch: master

commit 576d5a90a7521d56080e14a91d162164c45e3aa4
Author: Matt Riedemann <email address hidden>
Date: Mon Apr 7 08:44:07 2014 -0700

    Remove redundant tests from Qcow2TestCase

    Qcow2TestCase had exact copies of two tests in the parent
    _ImageTestCase so remove them. I'm assuming the tests originated
    in Qcow2TestCase but later more image types were added and the
    tests were pulled up into the common parent mixin since they
    applied to all types of images, but the redundant tests from
    Qcow2TestCase weren't cleaned up.

    Related-Bug: #1302211

    Change-Id: I031516b555ead5a3769fb62d90e373aac1b6baf1