Add http_listener class to system.telegraf.agent

Change-Id: I5d24665c65d015942e563855cf2889a5431d85f2
diff --git a/telegraf/agent/init.yml b/telegraf/agent/init.yml
index 3f6133d..ca7e2b0 100644
--- a/telegraf/agent/init.yml
+++ b/telegraf/agent/init.yml
@@ -1,5 +1,6 @@
 classes:
 - service.telegraf.agent
+- system.telegraf.agent.input.http_listener
 - system.telegraf.sudo
 parameters:
   telegraf:
diff --git a/telegraf/agent/input/http_listener.yml b/telegraf/agent/input/http_listener.yml
index 89720e4..6cdcf3c 100644
--- a/telegraf/agent/input/http_listener.yml
+++ b/telegraf/agent/input/http_listener.yml
@@ -1,13 +1,2 @@
-parameters:
-  _param:
-    telegraf_agent_http_listener_port: 8186
-  telegraf:
-    agent:
-      input:
-        http_listener:
-          bind:
-            address: 127.0.0.1
-            port: ${_param:telegraf_agent_http_listener_port}
-          read_timeout: 10s
-          write_timeout: 10s
-          tagexclude: ['hostname']
+classes:
+- service.telegraf.agent.input.http_listener