[VOL-4212] Updated enableMultiUni param handling in TT physical pipeline

Change-Id: I8f1116082a2112f8f2bffd005e550c21508a5fd4
diff --git a/jjb/pipeline/voltha-tt-physical-functional-tests.groovy b/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
index a65cad4..cfc6d46 100644
--- a/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
+++ b/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
@@ -196,7 +196,7 @@
       steps {
         sh """
         mkdir -p $ROBOT_LOGS_DIR
-        if ( !${enableMultiUni} ); then
+        if [ ${params.enableMultiUni} = false ]; then
           if ( ${powerSwitch} ); then
                export ROBOT_MISC_ARGS="--removekeywords wuks -L TRACE -i functionalTT -i PowerSwitch -e bbsim -e notready -d $ROBOT_LOGS_DIR -v POD_NAME:${configFileName} -v KUBERNETES_CONFIGS_DIR:$WORKSPACE/${configBaseDir}/${configKubernetesDir} -v container_log_dir:$WORKSPACE -v OLT_ADAPTER_APP_LABEL:${oltAdapterAppLabel}"
           else
@@ -219,7 +219,7 @@
         sh """
         mkdir -p $ROBOT_LOGS_DIR
         if [ "${params.branch}" == "master" ]; then
-          if ( !${enableMultiUni} ); then
+          if [ ${params.enableMultiUni} = false ]; then
             if ( ${powerSwitch} ); then
               export ROBOT_MISC_ARGS="--removekeywords wuks -L TRACE -i functionalTT -i PowerSwitch -e bbsim -e notready -d $ROBOT_LOGS_DIR -v POD_NAME:${configFileName} -v KUBERNETES_CONFIGS_DIR:$WORKSPACE/${configBaseDir}/${configKubernetesDir} -v container_log_dir:$WORKSPACE -v OLT_ADAPTER_APP_LABEL:${oltAdapterAppLabel} -V $ROBOT_TEST_INPUT_FILE"
             else