Add ansible/ansible to zuul

We'd like to run OpenStack tests on changes to Ansible. Before we do
that and report back to github, we should add ansible/ansible to the
config and then update the shade test config to list ansible/ansible in
the required-projects for the ansible-devel test.

Change-Id: Ib5e35315fc9ffe6fa8873ad4975309d9820e1feb

zuul/main.yaml

@@ -1364,3 +1364,6 @@
       github:
         untrusted-projects:
           - gtest-org/ansible
+          - ansible/ansible:
+              # Only load jobs, not pipelines, projects or other objects.
+              include: job