typo fix?

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

scripts/Jenkinsfile

@@ -67,7 +67,7 @@ pipeline {
                     // xmlTestSuite should be a list of XML files to execute
                     if (params.xmlTestSuite != null) {
                         for (xmlFile in params.xmlTestSuite) {
-                            echo "XML FILE      is xmlFile"
+                            echo "XML FILE      is $xmlFile"
                         }
                     }
                 }