General pipeline fixes and improvements

Change-Id: I4bbe38b200e33b4496bb04caa9212456f6c38d10
diff --git a/jjb/pipeline/voltha-scale-test.groovy b/jjb/pipeline/voltha-scale-test.groovy
index b83b3b3..103988c 100644
--- a/jjb/pipeline/voltha-scale-test.groovy
+++ b/jjb/pipeline/voltha-scale-test.groovy
@@ -100,6 +100,9 @@
 
             test -e $WORKSPACE/kind-voltha/voltha && cd $WORKSPACE/kind-voltha && ./voltha down
 
+            # remove orphaned port-forward from different namespaces
+            ps aux | grep port-forw | grep -v grep | awk '{print \$2}' | xargs kill -9
+
             cd $WORKSPACE
             rm -rf $WORKSPACE/*
           """