Decorator for skipping tests hitting known bugs

[Daniel Korn]

Adding an option to skip tests methods and classes when hitting know bug might be a useful util for the integration tests.

The decorator should be based on top of the foundation written in:
openstack_dashboard/test/integration_tests/tests/decorators.py

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/144695

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/144695
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=5b56140650969505f34a02f51f3b480d4609b7af
Submitter: Jenkins
Branch: master

commit 5b56140650969505f34a02f51f3b480d4609b7af
Author: dkorn <email address hidden>
Date: Thu Jan 1 16:48:07 2015 +0200

    Decorator for skipping tests hitting known bugs

    Adding skip_because decorator that can be used for decorating test
    classes as well as test methods.
    Decorator expects to recieve the bug numbers causing the test to skip.

    Partially implements blueprint: selenium-integration-testing
    Closes-Bug: #1406950

    Change-Id: Ie5eec615f09b6b2b20a73e372db2371ab1bf2819