periodic py jobs for vmware-nsx ocata and pike

The vmware-nsx project would like to implement periodic jobs to verify
py27/py35 tests on stable branches (stable/pike, stable/ocata). This
patch adds the periodic job definitions to the vmware-nsx project
pipeline.

Change-Id: I6c88f895e4af4ea255df169ba060b28381a052d4

zuul.d/projects.yaml

@@ -20046,6 +20046,7 @@
       - openstack-python-jobs-neutron
       - check-requirements
       - openstack-python35-jobs-neutron
+      - periodic-stable-jobs-neutron
       - publish-to-pypi-neutron
     check:
       jobs:
@@ -20161,6 +20162,36 @@
               - openstack/neutron-dynamic-routing
               - openstack/neutron-vpnaas
               - openstack/tap-as-a-service
+    periodic-stable:
+      jobs:
+        - openstack-tox-py27:
+            timeout: 5400
+            branches:
+              - stable/ocata
+              - stable/pike
+            required-projects:
+              - openstack/networking-l2gw
+              - openstack/networking-sfc
+              - openstack/neutron-lbaas
+              - openstack/vmware-nsxlib
+              - openstack/neutron-fwaas
+              - openstack/neutron-dynamic-routing
+              - openstack/neutron-vpnaas
+              - openstack/tap-as-a-service
+        - openstack-tox-py35:
+            timeout: 5400
+            branches:
+              - stable/ocata
+              - stable/pike
+            required-projects:
+              - openstack/networking-l2gw
+              - openstack/networking-sfc
+              - openstack/neutron-lbaas
+              - openstack/vmware-nsxlib
+              - openstack/neutron-fwaas
+              - openstack/neutron-dynamic-routing
+              - openstack/neutron-vpnaas
+              - openstack/tap-as-a-service
 
 - project:
     name: openstack/vmware-nsx-tempest-plugin