Add syslog support to the openstack module

This change depends on the syslog implementation in all other dependent
modules.

Conflicts:
	manifests/cinder/all.pp
	manifests/controller.pp
	manifests/keystone.pp
	spec/classes/openstack_cinder_all_spec.rb
	spec/classes/openstack_controller_spec.rb
	spec/classes/openstack_keystone_spec.rb

Cherry-picked from 9cda7a373b99fd514641dabed3633b723010265a in master.

Change-Id: Id500009a5308100775f1a35e20f7c089ff5a319b