Connect jenkins slave via docker network on swarm

Update jenkins location url for that case only

Change-Id: Icc74e24a4a4343ba32ca3bd7e2c15e9ea0e5ca6c
Related-prod: PROD:26834
diff --git a/docker/swarm/stack/jenkins/slave_base.yml b/docker/swarm/stack/jenkins/slave_base.yml
index 91601ab..3de4765 100644
--- a/docker/swarm/stack/jenkins/slave_base.yml
+++ b/docker/swarm/stack/jenkins/slave_base.yml
@@ -1,9 +1,7 @@
 classes:
+- system.docker
 - system.docker.client.images.jenkins_slave
 parameters:
   _param:
-    jenkins_master_host: ${_param:control_vip_address}
-    jenkins_master_url: http://${_param:jenkins_master_host}:${_param:jenkins_master_port}
-    jenkins_slave_user: ${_param:jenkins_client_user}
-    jenkins_slave_password: ${_param:jenkins_client_password}
+    jenkins_master_url: http://jenkins_master:8080
     jenkins_slave_extra_opts: ""