This makes use of the new way of returning console information from the
master daemon. Unittests are included.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

This patch converts hv_kvm to use utils.ShellWriter for writing
the network script. It also adds a few unittests (the first
for any hypervisor modules).

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>