Add a necessary import for RDF/JSON
Add a necessary import for RDF/JSON

Application class was already registering these classes, just making a
dependency explicit.

Signed-off-by: Andrew Berezovskyi <3651b37c3749fcd568b3a6fa4973cfc6e6df6402@kth.se>

EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu,EricssonResearch/scott-eu