Upstream Sphinx now has some new expectations that are no longer being
met by some of our tests because we mock the constructor for the
application class. Fix the test to ensure the application instance has
the needed attributes.
Change-Id: Iad009ce74301c9ffd49ff2b2bab4afd9b7dd1388
Signed-off-by: Doug Hellmann <doug@doughellmann.com>