Extend XMBeans to provide "default" behaviour when wrapping Standard MBeans

A problem we have we xmbeans is the verbosity of the xmbean descriptor. It is often the case that we just want to xmbean-ize an existing StandardMBean in order to use one of the xmbean features, like attribute persistence, attribute change notifications, attach an interceptor, or simply provide a richer metadata description to appear in the jmx-console.

I would be great to investigate if we could somehow provide defaults, for the case of wrapping StandardMBeans, where we only need to specify what is "different" (i.e. extra or overriden somehow) from the StandardMBean attribute/operation binding, rather than having to explicitly describe the MBean interface which could be derived from the StandardMBean, anyways.