Fix periodic neutron jobs

Add some neutron variants for periodic jobs so that the neutron repo is
checked out for these.

Change-Id: Ia5bd4d05997fb7b05c63d3d22f43fd2e2166864a

zuul.d/zuul-legacy-project-templates.yaml

@@ -398,6 +398,28 @@
         - legacy-periodic-docs-pike
         - legacy-periodic-python27-pike
 
+- project-template:
+    name: periodic-ocata-neutron
+    periodic-stable:
+      jobs:
+        - legacy-periodic-docs-ocata:
+            required-projects:
+              - openstack/neutron
+        - legacy-periodic-python27-ocata:
+            required-projects:
+              - openstack/neutron
+
+- project-template:
+    name: periodic-pike-neutron
+    periodic-stable:
+      jobs:
+        - legacy-periodic-docs-pike:
+            required-projects:
+              - openstack/neutron
+        - legacy-periodic-python27-pike:
+            required-projects:
+              - openstack/neutron
+
 - project-template:
     name: puppet-beaker-jobs
     check: