VOL-3061 Fix typo in config file name

Change-Id: Ia3368aa59a437ba3b630b553b057193044d015bb
diff --git a/jjb/pipeline/voltha-dt-physical-functional-tests.groovy b/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
index a576bc0..b03f9e2 100644
--- a/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
+++ b/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
@@ -135,7 +135,7 @@
 
     stage('Dataplane Tests') {
       environment {
-        ROBOT_CONFIG_FILE="$WORKSPACE/${configBaseDir}/${configDeploymentDir}/${configFileName}.yaml"
+        ROBOT_CONFIG_FILE="$WORKSPACE/${configBaseDir}/${configDeploymentDir}/${configFileName}-DT.yaml"
         ROBOT_FILE="Voltha_DT_PODTests.robot"
         ROBOT_LOGS_DIR="$WORKSPACE/RobotLogs/dt-workflow/DataplaneTests"
       }