Reduce the number of driver calls in "forward_ports" action
Reduce the number of driver calls in "forward_ports" action

Driver methods are slow. Since "forward_ports" action is now parallel-safe,
we can call driver method "read_forwarded_ports" only once per each machine.

Parallels/vagrant-parallels,legal90/vagrant-parallels,legal90/vagrant-parallels,Parallels/vagrant-parallels,legal90/vagrant-parallels,Parallels/vagrant-parallels