Clarify documentation for via-locations in access/egress

Added clarification to the numberOfViaLocationsVisited method documentation regarding via-locations.

Author: t2gran

raptor/src/main/java/org/opentripplanner/raptor/api/model/RaptorAccessEgress.java

@@ -128,6 +128,9 @@ default boolean hasTimePenalty() {
    * ore more via-locations. If so Raptor needs to know how many via-locations are included
    * so it can skip these.
    * <p>
+   * If the access/egress {@code stop} is a via-location then this method should include
+   * it in the count.
+   * <p>
    * The default is zero via-lcations visited.
    */
   default int numberOfViaLocationsVisited() {