Added user interaction for selecting console type

This patch provides interaction with user, asking console
type he'd like to use. It will show an appropriate connection
message after VM is created.

This patch will also update vm.conf accordingly to selected
option.

Change-Id: I6e177186f5d70802b3a66794edc091276a5a0cfe
Signed-off-by: Alex Lourie <alourie@redhat.com>
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>