Disable job execution on jenkins master

Change-Id: I1faedef9202793820c36d4f0baa3791eef3344ea
Related-prod: #PROD-29923 (PROD:29923)
diff --git a/jenkins/client/node.yml b/jenkins/client/node.yml
index e5e4d3b..2de0022 100644
--- a/jenkins/client/node.yml
+++ b/jenkins/client/node.yml
@@ -7,8 +7,7 @@
         master:
           node_mode: Exclusive
           remote_home: /var/lib/jenkins
-          labels:
-            - python
+          num_executors: 0
           launcher:
             type: master
         slave01: