jenkinsfile - use correct rsa key

api/Jenkinsfile.ble_test

@@ -42,7 +42,7 @@ pipeline {
                     sh """
                         cd /tmp
                         touch .hushlogin
-                        scp -i /root/.ssh/id_rsa .hushlogin root@${params.host_ip}:/root/.hushlogin
+                        scp -i /var/jenkins_home/jenkins_key .hushlogin root@${params.host_ip}:/root/.hushlogin
                         rm .hushlogin
                         """