define openstack-havana repo as bare link

rdo rpm for some reasons comes with puppetlabs and other useless repos
use yum for rhel and suse bits for ceilometer smoke
Merge pull request #50 from MirantisDellCrowbar/sbubnov/feature/rhel-havana/hydrogen/master

https://github.com/crowbar/barclamp-ceilometer/pull/50

Merged by devtool for ArkadyKanevsky