Add a non-voting py34 check job to os-brick

Change-Id: Idebbad3b0ce95556c82848f548560afe0be630e9

zuul/layout.yaml

@@ -841,6 +841,9 @@ jobs:
   - name: ^.*gerrit.*buck$
     branch: ^openstack/(?!2\.4).*$
 
+  - name: gate-os-brick-python34
+    voting: false
+
   - name: gate-oslo.messaging-dsvm-functional-rabbit
     branch: ^(?!stable/(icehouse|juno)).*$
 
@@ -3745,6 +3748,8 @@ projects:
       - name: publish-to-pypi
       - name: python-jobs
       - name: lib-forward-testing
+    check:
+      - gate-os-brick-python34
 
   - name: openstack/os-client-config
     template: