Add pep8 and validation jobs for project-navigator-data

https://review.openstack.org/457321 has been proposed which adds two tox
targets - pep8 and validate - which check that documents match the json
schema, and that the validation script passes hacking checks. Add them
so that we only land valid documents.

Change-Id: I3f2daf81654bcf4ba3b2f5ed9474c61751e74e05

jenkins/jobs/projects.yaml

@@ -10182,6 +10182,16 @@
     jobs:
       - linters-jobs
 
+- project:
+    name: project-navigator-data
+
+    jobs:
+      - python-jobs
+      - 'gate-{name}-tox-{envlist}-{node}':
+          envlist:
+            - validate
+          node: ubuntu-xenial
+
 - project:
     name: project-team-guide
 

zuul/layout.yaml

@@ -15275,7 +15275,12 @@ projects:
   - name: openstack/project-navigator-data
     template:
     - name: merge-check
-    - name: noop-jobs
+    check:
+      - gate-project-navigator-data-pep8-ubuntu-xenial
+      - gate-project-navigator-data-tox-validate-ubuntu-xenial
+    gate:
+      - gate-project-navigator-data-pep8-ubuntu-xenial
+      - gate-project-navigator-data-tox-validate-ubuntu-xenial
 
   - name: openstack/project-team-guide
     template: