VOL-2000 Add sanity-test on voltha-helm-chart patchsets

Change-Id: I1690d6b084ca4b7615fce42b5647daea2aa9213b
diff --git a/jjb/voltha-e2e.yaml b/jjb/voltha-e2e.yaml
index 34e39c9..253ad0c 100644
--- a/jjb/voltha-e2e.yaml
+++ b/jjb/voltha-e2e.yaml
@@ -205,6 +205,11 @@
           default: '-e notready'
           description: 'test tags'
 
+      - bool:
+         name: buildImages
+         default: {buildImages}
+         description: 'Build modified voltha components'
+
     project-type: pipeline
     concurrent: true