[VOL-4536] Using a single ONOS instance in the certification jobs

Change-Id: Ib62351faad31ae134d65df0d982d7720db9ac6f0
diff --git a/jjb/voltha-test/voltha-certification.yaml b/jjb/voltha-test/voltha-certification.yaml
index eec43c4..e7a2252 100644
--- a/jjb/voltha-test/voltha-certification.yaml
+++ b/jjb/voltha-test/voltha-certification.yaml
@@ -12,9 +12,11 @@
     power-switch: False
     work-flow: 'ATT'
     in-band-management: false
-    num-of-openonu: '1'
-    num-of-onos: '3'
-    num-of-atomix: '3'
+    num-of-openonu: 1
+    num-of-onos: 1
+    num-of-atomix: 1
+    num-of-kafka: 1
+    num-of-etcd: 1
     reinstall-olt: true
     test-type: ''
     volthaSystemTestsChange: ''