Bump jenkins image version

Change-Id: I987697c41f34d68ce3b9b1af6cf7da41c0e8110a
diff --git a/docker/swarm/stack/jenkins/master.yml b/docker/swarm/stack/jenkins/master.yml
index 5f8de05..e974dee 100644
--- a/docker/swarm/stack/jenkins/master.yml
+++ b/docker/swarm/stack/jenkins/master.yml
@@ -2,7 +2,7 @@
 - system.docker
 parameters:
   _param:
-    docker_image_jenkins: tcpcloud/jenkins:2.73
+    docker_image_jenkins: tcpcloud/jenkins:2.83
     jenkins_master_extra_opts: ""
     jenkins_master_executors_num: 4
     jenkins_master_max_concurent_requests: 40