Fixing missing space in EXTRA_HELM_FLAGS for registry

Change-Id: I44ab8918dc756ee40b616b52151d971fa70d6f9b
diff --git a/jjb/pipeline/voltha-openonu-go-tests.groovy b/jjb/pipeline/voltha-openonu-go-tests.groovy
index 27768bd..f2ec4b0 100755
--- a/jjb/pipeline/voltha-openonu-go-tests.groovy
+++ b/jjb/pipeline/voltha-openonu-go-tests.groovy
@@ -39,7 +39,7 @@
     CONFIG_SADIS="external"
     BBSIM_CFG="configs/bbsim-sadis-att.yaml"
     ROBOT_MISC_ARGS="-d $WORKSPACE/RobotLogs"
-    EXTRA_HELM_FLAGS=" --set defaults.image_registry=https://mirror.registry.opennetworking.org"
+    EXTRA_HELM_FLAGS=" --set defaults.image_registry=https://mirror.registry.opennetworking.org "
   }
   stages {
     stage('Clone kind-voltha') {