Fluentd: Add type_name to default elasticsearch output

The change that modified the output configurations for fluentd
accidentally removed the type_name from the default elasticsearch
output, which prevents the output from using the fluent template
that's defined in the chart. This replaces the type_name for that
output

Change-Id: I2098ca8c243d55f0446ea623a80b5b40e3acff8c

fluent-logging/values.yaml

@@ -433,6 +433,7 @@ conf:
         host: "#{ENV['ELASTICSEARCH_HOST']}"
         port: "#{ENV['ELASTICSEARCH_PORT']}"
         logstash_format: true
+        type_name: fluent
         buffer:
           -
             - header: buffer