Using pre-release custom ONOS image in all tests

Change-Id: Idebaf50ef6eedd7c59c020b87a46139fd54b8d31
diff --git a/jjb/voltha-scale.yaml b/jjb/voltha-scale.yaml
index 3a3cc91..5f423ff 100644
--- a/jjb/voltha-scale.yaml
+++ b/jjb/voltha-scale.yaml
@@ -64,6 +64,7 @@
           withDhcp: true
           withIgmp: false
           extraHelmFlags: '--set authRetry=false,dhcpRetry=false -f /home/jenkins/voltha-scale/voltha-values.yaml --set etcd.persistence.enabled=true,etcd.persistence.storageClass=longhorn'
+          onosImg: 'matteoscandolo/voltha-onos:oltapp'
 
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-master-2-16-32-dt-subscribers'
@@ -80,6 +81,7 @@
           withDhcp: false
           withIgmp: false
           extraHelmFlags: '-f /home/jenkins/voltha-scale/voltha-values.yaml --set etcd.persistence.enabled=true,etcd.persistence.storageClass=longhorn'
+          onosImg: 'matteoscandolo/voltha-onos:oltapp'
 
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-master-2-16-32-tt-subscribers'
@@ -102,6 +104,7 @@
             --set global.rpc_timeout=30s,global.adapter_open_onu.timeout=30s,global.adapter_open_olt.timeout=30s,global.adapter_open_olt.rpc_timeout=30s
           onosStatInterval: 30
           onosGroupInterval: 30
+          onosImg: 'matteoscandolo/voltha-onos:oltapp'
 
       # multi-stack jobs
       - 'voltha-scale-measurements':
@@ -122,6 +125,7 @@
           withDhcp: true
           withIgmp: false
           extraHelmFlags: "-f /home/jenkins/voltha-scale/voltha-values.yaml --set etcd.persistence.enabled=true,etcd.persistence.storageClass=longhorn"
+          onosImg: 'matteoscandolo/voltha-onos:oltapp'
 
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-master-10-stacks-2-16-32-dt-subscribers'
@@ -141,6 +145,7 @@
           withDhcp: false
           withIgmp: false
           extraHelmFlags: "-f /home/jenkins/voltha-scale/voltha-values.yaml --set etcd.persistence.enabled=true,etcd.persistence.storageClass=longhorn"
+          onosImg: 'matteoscandolo/voltha-onos:oltapp'
 
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-master-10-stacks-2-16-32-tt-subscribers'
@@ -160,6 +165,7 @@
           withDhcp: true
           withIgmp: true
           extraHelmFlags: "-f /home/jenkins/voltha-scale/voltha-values.yaml --set etcd.persistence.enabled=true,etcd.persistence.storageClass=longhorn"
+          onosImg: 'matteoscandolo/voltha-onos:oltapp'
 
       # voltha-2.8 Jobs
       - 'voltha-scale-measurements':