Stop fluentd deprecation warnings of type vs @type

Currently when elasticsearch log output is enabled there are lots
of warnings going into elasticsearch about type being deprecated
and needing to move to @type. This change stops those warnings.

TrivialFix

Change-Id: Ideac1925cb764ad0d7d8416f56d5e4a993c6d8b6
(cherry picked from commit 0c7ba86)

Author: JohnGarbutt

ansible/roles/common/templates/conf/output/00-local.conf.j2

@@ -136,7 +136,7 @@
   </store>
 {% if log_direct_to_elasticsearch %}
   <store>
-       type elasticsearch
+       @type elasticsearch
        host {{ elasticsearch_address }}
        port {{ elasticsearch_port }}
        scheme {{ fluentd_elasticsearch_scheme }}
@@ -197,7 +197,7 @@
   </store>
 {% if log_direct_to_elasticsearch %}
   <store>
-       type elasticsearch
+       @type elasticsearch
        host {{ elasticsearch_address }}
        port {{ elasticsearch_port }}
        scheme {{ fluentd_elasticsearch_scheme }}