New jenkins version

Change-Id: Ib2527e10a971f861a853c7df598c4ea54dacafed
diff --git a/docker/swarm/stack/jenkins/master.yml b/docker/swarm/stack/jenkins/master.yml
index bc01e92..c8c6b64 100644
--- a/docker/swarm/stack/jenkins/master.yml
+++ b/docker/swarm/stack/jenkins/master.yml
@@ -1,6 +1,6 @@
 parameters:
   _param:
-    docker_image_jenkins: tcpcloud/jenkins:2.71
+    docker_image_jenkins: tcpcloud/jenkins:2.73
     jenkins_master_extra_opts: ""
     jenkins_master_executors_num: 4
   docker: