[VOL-3878] Using the patch under test when running sanity on voltha-helm-charts

Change-Id: Ie8120a2b03d78611935ebabdcd97eda0d82a24e1
diff --git a/vars/volthaDeploy.groovy b/vars/volthaDeploy.groovy
index 45e214d..dae88a8 100644
--- a/vars/volthaDeploy.groovy
+++ b/vars/volthaDeploy.groovy
@@ -15,6 +15,7 @@
       stackId: 1,
       workflow: "att",
       extraHelmFlags: "",
+      localCharts: false, // wether to use locally cloned charts or upstream one (for local we assume they are stored in $WORKSPACE/voltha-helm-charts)
     ]
 
     if (!config) {