Missed tests for clients moved from contrib

[Sergey Kraynev]

The most part of clients in Heat has unittests for functions or constraints described in the client module.

In the same time all clients in contrib has not such tests. So migrating them may reduce the total coverage (not so much, but still).

So I think, that we should add unittests for new clients in main tree.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/189684

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/189684
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=011111f423d8a50fc66a383c0f28c76a9854105a
Submitter: Jenkins
Branch: master

commit 011111f423d8a50fc66a383c0f28c76a9854105a
Author: Tetiana Lashchova <email address hidden>
Date: Tue Jun 9 15:23:38 2015 +0300

    Add test for barbican client

    Change-Id: I9236e62f3259cfd560e3837830191012d107e853
    Partial-Bug: #1461967

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/190216

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/190216
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=13db9ccfee2c52f20171b11711fa1079b81118db
Submitter: Jenkins
Branch: master

commit 13db9ccfee2c52f20171b11711fa1079b81118db
Author: Tetiana Lashchova <email address hidden>
Date: Tue Jun 9 18:33:13 2015 +0300

    Test manila and zaqar exceptions

    Change-Id: Id171030db4ede009885b9f330edd4c61f38529fe
    Closes-Bug: #1461967