added namespaceRegistry lookups for property prefixes

https://www.pivotaltracker.com/s/projects/684825/stories/82135176

modified properties are sent to the JMS eventBus with simple prefixes, such as dc:title or jcr:lastModified.

This is not useful for external applications that are unable to dereference these prefixes. This change causes the properties to be listed as fully qualified URIs.