Sync logging from upstream puppet modules for OS

* Sync log_dir/log_file/use_syslog usage from upstream in order to
  use the same logging guidelines for all OS modules in Fuel as well
* Add new use_syslog_rfc_format option in addition to use_syslog in
  order to ensure RFC5424 comliant logging to syslog for all OS services
* Fix remote logs matching for multiline messages
  (Use octet-framing at sender side)
* Simplify matching logic (&~) for remote logs processing
* Remove artificial separation for DEBUG and other OS logging cases
* Remove unneeded anymore imfile::templates
* Remove unneeded anymore python log configs templates for OS and
  syslog_log_level option used for its log configs as well
* Remove artificial logging w/a for Neutron and its imfile templates
* Fix ceilometer facility to LOCAL0 and its facility parameter usage
* Move Fuel customizations from rsyslog module to openstack
  * Move custom logging templates and configuration
  * Move checksum_udp and use rsyslog port as a class var
  * Keep custom port and escapenewline vars for rsyslog module,
  * Disable RELP package for syslog module unless it would be used in Fuel
* Fix identations...

Implemenets step2 for blueprint refactor-logging-puppet-openstack-services

Change-Id: Ie20725b9c91584311350a520107a79a4828937bc
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>