Adding space after EXTRA_HELM_FLAGS

Change-Id: Id798556a9c0a610b8c065da07b0c6632a75c920c
diff --git a/jjb/pipeline/voltha-openonu-go-tests.groovy b/jjb/pipeline/voltha-openonu-go-tests.groovy
index 8af7571..cdb2c90 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=mirror.registry.opennetworking.org"
+    EXTRA_HELM_FLAGS=" --set defaults.image_registry=mirror.registry.opennetworking.org "
   }
   stages {
     stage('Clone kind-voltha') {