Seeting ONOS flows and groups stats to 10s by default on the VOLTHA scale test

Change-Id: I81a4a3d609456df80963aeebff4be986ed4f9907
diff --git a/jjb/voltha-scale.yaml b/jjb/voltha-scale.yaml
index ef58d06..3a3cc91 100644
--- a/jjb/voltha-scale.yaml
+++ b/jjb/voltha-scale.yaml
@@ -648,8 +648,8 @@
     kafkaReplicas: 3
     etcdReplicas: 3
     extraHelmFlags: ''
-    onosStatInterval: 5
-    onosGroupInterval: 1
+    onosStatInterval: 10
+    onosGroupInterval: 10
     flowObjWorkerThreads: 12
     volthaSystemTestsChange: ''
     volthaHelmChartsChange: ''
@@ -752,8 +752,8 @@
     kafkaReplicas: 1
     etcdReplicas: 1
     extraHelmFlags: ''
-    onosStatInterval: 5
-    onosGroupInterval: 1
+    onosStatInterval: 10
+    onosGroupInterval: 10
     flowObjWorkerThreads: 12
     volthaSystemTestsChange: ''
     volthaHelmChartsChange: ''