add missing script block

Jenkinsfile

@@ -236,10 +236,12 @@ pipeline {
             junit testResults: '**/target/surefire-reports/*.xml', skipPublishingChecks: true
         }
         failure {
+            script {
                 sendMatrixMessage.sendFailureMessage(FAILED_STAGE)
             }
         }
     }
+}
 
 
 Boolean isReleaseBranch() {