Disable job execution on jenkins master

Change-Id: I1faedef9202793820c36d4f0baa3791eef3344ea
Related-prod: #PROD-29923 (PROD:29923)
diff --git a/kubernetes/control/services/drivetrain/jenkins_master.yml b/kubernetes/control/services/drivetrain/jenkins_master.yml
index 36d8c5a..a564318 100644
--- a/kubernetes/control/services/drivetrain/jenkins_master.yml
+++ b/kubernetes/control/services/drivetrain/jenkins_master.yml
@@ -1,7 +1,7 @@
 parameters:
   _param:
     jenkins_master_extra_opts: ""
-    jenkins_master_executors_num: 4
+    jenkins_master_executors_num: 0
     jenkins_master_max_concurent_requests: 40
     jenkins_home_dir_path: /var/jenkins_home
   kubernetes: