Included quickstack::load_balancer::common

into quickstack::pacemaker::load_balancer

To avoid following error when all $include_* are false (testing use cases):
"Could not find resource 'Service[haproxy]' for relationship from 'Quickstack::Pacemaker::Vips[loadbalancer]'"
Merge pull request #285 from gildub/bug/HA_load_balancer+include

Included quickstack::load_balancer::common