findbugs: ignore: add ignore for super.clone from VDS.clone method

findbugs complains that VDS clone() method is not calling it super class clone()
method.
we cannot call super.close() because this code compile to GWT as well,
and GWT does not support CloneNotSupportedException which is thrown
when adding this code.

findbugs reason:
CN: clone method does not call super.clone() (CN_IDIOM_NO_SUPER_CALL)

Change-Id: I9954242e24851df299c0d4d74f6466a66327120f
Signed-off-by: Shahar Havivi <shavivi@redhat.com>