Fuel can add hostname aliases identifying a host as handling its particular roles

For cloud administration, it is useful to be able to construct for-loops which ssh to each node handling a particular role.
Fuel can add aliases when naming nodes, to simplify the creation of these bash for-loops.

For example instead of:
node-01
node-02
node-03
node-04

we would have:
node-01, controller-01
node-02, compute-02
node-03, compute-03
node-04, compute-04