findbugs: ignore: class does not call super.clone method

its look like a problem in findbugs because the super class is abstract
and does not implement clone() method so its not possible to call
super.clone()

Change-Id: Ifc20e846928ae774dfd76df30468cc1364e48966
Signed-off-by: Shahar Havivi <shavivi@redhat.com>