fix debian packaging

nfs-common is required for a basic NFS installation both in
management server and agent.

Signed-off-by: Hiroaki KAWAI <kawai@stratosphere.co.jp>
CLOUDSTACK-2406: fix UI strings

Japanese properties file was broken, fixed manually.
We need to let the servlet container the encoding to use.

Signed-off-by: Hiroaki KAWAI <kawai@stratosphere.co.jp>