Add a zuul test to run on github3.py changes

Change-Id: I661f9a95f1691c900d536554a6c3caed4e395b9c

tools/zuul-projects-checks.py

@@ -32,8 +32,8 @@ def check_system_templates():
     for entry in projects:
         project = entry['project']
         # TODO(mordred) Generalize this, but for now, avoid doing this check
-        # on ansible.
-        if project['name'] == 'ansible/ansible':
+        # on projects we run third part ci for.
+        if project['name'] in ['ansible/ansible', 'sigmavirus24/github3.py']:
             continue
         try:
             correct = False

zuul.d/projects.yaml

@@ -17320,3 +17320,12 @@
         - nodejs-npm-run-lint:
             vars:
               node_version: 4
+
+- project:
+    name: sigmavirus24/github3.py
+    # sigmavirus24/github3.py does not include system-required on purpose. We
+    # do not gate sigmavirus24/github3.py and we should not be doing
+    # merge-check on it.
+    third-party-check:
+      jobs:
+        - tox-py35-on-zuul