CLOUDSTACK-255: fix NPE in createPortForwardingRule due to no PortForwarding provider
(cherry picked from commit c9d492d7140dd53f1630bc5ea14b948184233612)
volume /usr was sized to small and ends up being 100% full on SSVMs and CVMs. By juggling some partman-auto numbers the space gets devided more evenly. After this patch /usr should be around 80% full. I've also reduced the swap space because this makes no sense on virtual instances.

Signed-off-by: Daan Hoogland <daan@onecht.net>