import * is used in a lot of test files

[Sushil Kumar]

import * is used in a lot of test files.
This is suppressed by a flake8 ignore F403.

When we enable this flake8 rule, we start getting errors for import *

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/64342

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/64342
Committed: https://git.openstack.org/cgit/openstack/trove/commit/?id=167c0ceb7a49ba3a687883eff86074d15b917493
Submitter: Jenkins
Branch: master

commit 167c0ceb7a49ba3a687883eff86074d15b917493
Author: Sushil Kumar <email address hidden>
Date: Sat Dec 28 18:29:14 2013 +0000

    Enabled F403 flake8 rule

    Reasons:
    - F403 is disabled.
    - code contains "import *" statements.

    Changes:
    - Updates tox.ini to enable F403 rules.
    - Updates code for F403 violation.

    Change-Id: If932a910c073ae7bffb74908495f35dbc4f4d1f9
    Closes-Bug: #1264724