changed variable formatting method

scripts/build/Jenkins/Jenkinsfile

@@ -361,7 +361,7 @@ def TestMetrics(Map options, String workspace, String branchName, String repoNam
             ]
             withCredentials([usernamePassword(credentialsId: "${env.SERVICE_USER}", passwordVariable: 'apitoken', usernameVariable: 'username')]) {
                 def command = "${options.PYTHON_DIR}/python.cmd -u mars/scripts/python/ctest_test_metric_scraper.py " +
-                              '-e jenkins.creds.user $username -e jenkins.creds.pass $apitoken ' +
+                              '-e jenkins.creds.user %username% -e jenkins.creds.pass %apitoken% ' +
                               "-e jenkins.base_url ${env.JENKINS_URL} " +
                               "${cmakeBuildDir} ${branchName} %BUILD_NUMBER% AR ${configuration} ${repoName} "
                 bat label: "Publishing ${buildJobName} Test Metrics",