Add WSGIPassAuthorization to the keystone apache template

For the OS-OAUTH1 Keystone extension to fully work under Apache,
the WSGIPassAuthorization parameter must be set to On, rather
than the default of Off. This will make functional testing of
this extension much easier.

Change-Id: I5dcbdd27e7ef7a60fe3c7cb8b9c3c83b4197dfc1
Merge "Add WSGIPassAuthorization to the keystone apache template"
Merge branch 'master' of https://github.com/openstack-dev/devstack