Errors reported in wait functions for volume deletes, but tests pass

[Matthew Treinish]

In some cases the gets in the wait loops on deletion are returning 404 errors. This prints errors in log from the rest client, but it doesn't affect the tests results. Better logic is needed here to prevent the errors from being logged.

An example log with this issue:

http://logs.openstack.org/14468/13/check/gate-tempest-devstack-vm/20357/console.html

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/17227

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/17227
Committed: http://github.com/openstack/tempest/commit/426326ec7a83f9b70520113b67d3303a991b007d
Submitter: Jenkins
Branch: master

commit 426326ec7a83f9b70520113b67d3303a991b007d
Author: Matthew Treinish <email address hidden>
Date: Fri Nov 30 13:17:00 2012 -0500

    Fix issue with 404 logs on wait for delete.

    In some cases the wait on volume deletes will receive a 404
    error which results in a log output. However for these tests
    this is the expected behavior so the log output isn't needed.

    This adds a flag to suppress log output on 404 errors, which
    is then used on all wait functions.

    Fixes: bug 1084283
    Change-Id: Id455a22317ecbdf318e9ad2ea0a76ad9f08ca899