bug 451582: java.lang.ClassCastException when registring service with
EventListener interface 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=451582

Change-Id: Ib3f5b39c6ac1f62c1a22c5163b250e398a4cd55b
Signed-off-by: Judith Gull <jgu@bsiag.com>
Reviewed-on: https://git.eclipse.org/r/36640
Tested-by: Hudson CI