Using local chart for voltha-2.9 installations

Change-Id: Ibb7f17bcd73cdf4199538bed39f28822bbbb7444
diff --git a/jjb/pipeline/voltha/voltha-2.9/physical-build.groovy b/jjb/pipeline/voltha/voltha-2.9/physical-build.groovy
index 51313a6..0cce069 100644
--- a/jjb/pipeline/voltha/voltha-2.9/physical-build.groovy
+++ b/jjb/pipeline/voltha/voltha-2.9/physical-build.groovy
@@ -96,7 +96,7 @@
           script {
             // if we're downloading a voltha-helm-charts patch, then install from a local copy of the charts
             def localCharts = false
-            if (volthaHelmChartsChange != "") {
+            if (volthaHelmChartsChange != "" || branch != "master") {
               localCharts = true
             }