TypeError when accessing horizon_main_nav element

[Matthias Runge]

Our customized UI uses horizon_main_nav templatetag rather than horizon_nav. It's quite useful, if you just want to get main navigation items.

Sadly, since last panel chang, this is broken, failing on TypeError.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/121052

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/121052
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=fa94e79eca609d9fade8624c40f3a959ae3e5bd4
Submitter: Jenkins
Branch: master

commit fa94e79eca609d9fade8624c40f3a959ae3e5bd4
Author: Sam Betts <email address hidden>
Date: Fri Sep 12 12:19:54 2014 +0100

    Corrected dash.can_access call to take context

    horizon_main_nav makes a call to dash.can_access which should take
    context but was being passed the request, this patch corrects that.
    Unit test added to prevent regression, and fix added to RbacHorizonTests
    to clean up changes to Cats and Dogs test dashboards, as it was
    affecting any test that followed.

    Change-Id: I46d9880ba3ac46c23a8253a4afcf2c169d6f4dc8
    Closes-Bug: 1368673