add collectd-ceilometer-plugin
add collectd-ceilometer-plugin

It is a plugin to collectd to send data to ceilometer,
it has BR on openstack libraries

Fedora review is here
https://bugzilla.redhat.com/show_bug.cgi?id=1402319

Change-Id: Ib0c71c18210c850df38fac77157ddbc97a0b9c39

redhat-openstack/rdoinfo,javierpena/rdoinfo