[DS-2729] Ensure SiteService extends DSpaceObjectService

dspace-api/src/main/java/org/dspace/eperson/EPersonServiceImpl.java

@@ -224,6 +224,11 @@ public class EPersonServiceImpl extends DSpaceObjectServiceImpl<EPerson> impleme
                 "eperson_id=" + ePerson.getID()));
     }
 
+    @Override
+    public int getSupportsTypeConstant() {
+        return Constants.EPERSON;
+    }
+
     @Override
     public void setPassword(EPerson ePerson, String password) {
         PasswordHash hash = new PasswordHash(password);