Disable collectd syslog logging

https://github.com/Mirantis/mk-lab-salt-model/pull/176
diff --git a/collectd/remote_client/output/heka.yml b/collectd/remote_client/output/heka.yml
index ec3b5e0..a5a509d 100644
--- a/collectd/remote_client/output/heka.yml
+++ b/collectd/remote_client/output/heka.yml
@@ -12,3 +12,4 @@
           timeout: 5
       read_interval: 10
       use_fqdn: false
+      syslog_logging: false