[Registry-dev] Needing a context for Registry

[Deepal Jayasinghe]

At the beginning  we had to throw away the RegistryContext (runtime
object of the registry) since we did not find real  use of having that.
But now we are storing three separate properties in System.properties so
how about introduce a new class to keep all of them and store only that
in the System.property (In the future we may have some more). We are
storing following in the servlet and system.properties

 - Registry instance
 - systemRegistry
 - RegistryRealm

Thoughts ...

-Deepal