#178 Generic Values in the MBeanRegistry

[Adrian Brock]

Changed the MBeanRegistry to store a generic
map of data against a registration.
This is mostly for use within JBossMX where
a service needs to attach some context to the
registered mbean.
There is no setter. The context is established
at MBean registration.

Look at test.implementation.registry.ValuesTestCase
for examples on how to use this.

Regards,
Adrian