Start d2r on molgenis n3 mapping :

 * In local installation d2r-server -p 2020 molgenis.n3
 * there are some exception about : 
   * de.fuberlin.wiwiss.d2rq.D2RQException: Column @@digital_identity.digital_identity_id@@ not found in database (E0)
   *    * Exception in thread "main" java.lang.!NullPointerException

	at de.fuberlin.wiwiss.d2rs.!JettyLauncher.start(!JettyLauncher.java:68) [[BR]]

	at d2r.server.startServer(!server.java:86) [[BR]]

	at d2r.server.main(!server.java:57) [[BR]]
 * 
   *    *