tests; Bump wait delay for shutdown to 120s
tests; Bump wait delay for shutdown to 120s

On very busy boards with slow IO, the shutdown process can take over 60s
as the disk is syncing.

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

ojkastl/lxc_Patches,ojkastl/lxc_Patches,ojkastl/lxc_Patches,ojkastl/lxc_Patches