Fix telegraf output for influxdb

Kolla add multiple url in one outputs.influxdb.
This configuration is when influxdb is in cluster mode.
We need to write one conf by influxdb server.

Change-Id: I1c788b3c8400e74d50cace5a334311408989c5e1

ansible/roles/telegraf/templates/telegraf.conf.j2

@@ -12,12 +12,14 @@
   hostname = ""
   omit_hostname = false
 {% if enable_influxdb | bool %}
+{% for host in groups['influxdb'] %}
 [[outputs.influxdb]]
-  urls = [{% for host in groups['influxdb'] %}"{{ influxdb_proto }}://{{ hostvars[host]['ansible_' + hostvars[host]['api_interface']]['ipv4']['address']}}:{{ influxdb_http_port }}"{% if not loop.last %},{% endif %}{% endfor %}]
+  urls = ["{{ influxdb_proto }}://{{ hostvars[host]['ansible_' + hostvars[host]['api_interface']]['ipv4']['address']}}:{{ influxdb_http_port }}"]
   database = "telegraf" # required
   retention_policy = "autogen"
   write_consistency = "any"
   timeout = "5s"
+{% endfor %}
 {% endif %}
 [[inputs.cpu]]
   percpu = true