Compute and controller syntax fixes

The missing colons after class names prevented the classes from
getting imported into foreman.
Top-down parameter passing from host group classes

We need to pass parameters from host group classes
(quickstack::controller and quickstack::compute) into "resourced"
classes inside them, so that parameters can be overriden by
Foreman. (Otherwise, hardcoded values from params.pp would be used.)

Parameter lists are now sorted alphabetically for easier orientation.
Remove unused admin_password from quickstack::neutron::compute