Signed-off-by: endika <endika.aldecoa@ehu.eus>

Signed-off-by: beierlm <mark.beierl@canonical.com>

Adds descriptors for the firewall
Updates Virtual PC to use two networks and adds more actions

Signed-off-by: beierlm <mark.beierl@canonical.com>

A simple descriptor that uses a native charm to launch a clean
Ubuntu base image and layer a graphical desktop environment
and RDP server on top.

Signed-off-by: beierlm <mark.beierl@canonical.com>