Add openstack::logfilter class for logstash

- Install and configure logstash, elasticsearch, kibana by its templates (default is fuel node)
- Provide rsyslog client sided templates for logstash remote logging as well as rsyslog ones
- Assume logstash defaults fuel:55514, udp - for anaconda logs capturing
(thus, logstash non-defaults should not be used for now)
- Use paragraph based message detection for rabbitmq (imfile)
- Use user facility and line based (default) message detection for openstack DEBUG (imfile)
- Ensure new logfiles introduced for logstash and elasticsearch are rotated

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>