Enable logging.conf & fluentd for heat

This change introduce ability to use log_config_append parameter with
new FluentdHandler to send logs directly to Fluentd.

To save per binary log streams as it is in the default logging states generates
separate logging.conf files per service and use /etc/default/<service name>
to pass dedicated logging.conf to every service.

Change-Id: I283e95bf7c2902b2c7830db54de5c49d4fda8fa0
Related-Prod: PROD-16324
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index e39cbbd..a2c7a62 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -3,6 +3,8 @@
     _support:
       collectd:
         enabled: true
+      fluentd:
+        enabled: true
       heka:
         enabled: true
       sensu: