jenkins: lock simulator

Author: adeebshihadeh

Jenkinsfile

@@ -89,8 +89,10 @@ pipeline {
             sh "git config --global --add safe.directory ${WORKSPACE}"
             sh "git lfs pull"
             sh "${WORKSPACE}/tools/sim/build_container.sh"
-            sh "DETACH=1 ${WORKSPACE}/tools/sim/start_carla.sh"
-            sh "${WORKSPACE}/tools/sim/start_openpilot_docker.sh"
+            lock(resource: "", label: "simulator", inversePrecedence: true, quantity: 1) {
+              sh "DETACH=1 ${WORKSPACE}/tools/sim/start_carla.sh"
+              sh "${WORKSPACE}/tools/sim/start_openpilot_docker.sh"
+            }
           }
 
           post {