Enable logging.conf & fluentd for cinder

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: I7b062f671aaaf0359a3ed072a8a0259023b4da8e
Related-Prod: PROD-16324
16 files changed