Create devstack-tobiko-gate zuul template

Change-Id: I4f98d042daec0660ea2d0016c8fa2d6d43a162b5

zuul.d/project-templates.yaml

@@ -0,0 +1,15 @@
+---
+
+- project-template:
+    name: devstack-tobiko-gate
+    description: |
+      DevStack jobs intended to gate Tobiko project changes
+
+    check: &pipeline
+      jobs:
+        - devstack-tobiko-gate
+        - devstack-tobiko-gate-ovn
+
+    gate: *pipeline
+
+    periodic: *pipeline

zuul.d/project.yaml

@@ -1,18 +1,16 @@
 ---
 
 - project:
+    templates:
+      - devstack-tobiko-gate
 
     gate:
       jobs:
         - openstack-tox-linters
-        - devstack-tobiko-gate
-        - devstack-tobiko-gate-ovn
 
-    check: &check
+    check: &pipeline
       jobs:
         - openstack-tox-linters
-        - devstack-tobiko-gate
-        - devstack-tobiko-gate-ovn
         - devstack-tobiko-gate-centos
         - devstack-tobiko-gate-ubuntu
         - devstack-tobiko-gate-ovn-centos
@@ -22,4 +20,4 @@
         - devstack-tobiko-faults-ovn-centos
         - devstack-tobiko-faults-ovn-ubuntu
 
-    periodic: *check
+    periodic: *pipeline