Cannot display Overview panel when Quantum enabled

[Akihiro Motoki]

When quantum-enabled devstack, I could not show overview of userpanel (http://localhost/nova/).

When quantum is enabled, api.nova.tenant_quota_usages() fails because floating IP support is under development.
horizon.usage.base.BaseUsage.quota() (recently) doss not handle exception. As a result, django error message is displayed on a browser.

Floating IP issue with Quantum will be addressed in Folsom-rc1 (or F-3 if possible).
But Horizon should handle client exception properly.

[Akihiro Motoki (amotoki)]

The patch is available on gerrit. https://review.openstack.org/#/c/11455/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/11455

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/11455
Committed: http://github.com/openstack/horizon/commit/dfe0cf8e26fed4c5e83964af620ca80df4bb6f74
Submitter: Jenkins
Branch: master

commit dfe0cf8e26fed4c5e83964af620ca80df4bb6f74
Author: Akihiro MOTOKI <email address hidden>
Date: Thu Aug 16 16:00:01 2012 +0900

    Catch an exception of API call when retrieving quota usage.

    Fixes bug 1037438

    Before this commit, api.nova.tenant_quota_usages() is called multiple
    times when rendering a template. This commit fixes it and now the API
    call is called only once.

    Change-Id: Ia9eb1fb2b956966ad26501e7b6af65e927067f20