Using released voltha-onos for VOLTHA-2.7

Change-Id: I332e04743c704cec0e8eac1c2dce3e987e65ecd3
diff --git a/voltha-infra/values.yaml b/voltha-infra/values.yaml
index ebd8a4b..113e1c4 100644
--- a/voltha-infra/values.yaml
+++ b/voltha-infra/values.yaml
@@ -26,7 +26,7 @@
   image:
     pullPolicy: Always
     repository: voltha/voltha-onos
-    tag: master
+    tag: 4.3.1
   apps:
     - org.onosproject.lldpprovider
     - org.onosproject.openflow-base