BUG-865: Remove SchemaServiceListener

Eradicates the long-deprecated SchemaServiceListener.
SchemaContextListener is the new name for the equivalent service.

Requires controller to merge I15d495d805eb7a08c3bcd3ab0cf8b5a8d2797db5.

Change-Id: I38185b131e9745c0cad366c38428e8be9a8fb4fe
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge "BUG-865: Remove SchemaServiceListener"