add ceilometer role
add heat role
add glance role
add neutron role
add nova-common role
add nova-control role
add nova-compute role
remove consolidated openstack-controller role
remove the outdated openstack-compute role
add mongodb role
update definitions of controllers and compute-nodes with separate roles
comment out the use of the keystone_manage module (not compatible with Icehouse yet)
add installation of sos-plugins-openstack into the common role