A new API methods has been added in Ratings script service to allow computing back the average ratings when needed.

The signature of the method is the following:

     * Recompute the average rating of a reference.
     * Note that this method can be resource consuming if the set of data is large.
     * @param reference the reference for which to recompute the average ratings.
     * @return the average rating in an optional or an empty optional in case of error.
     * @since 13.7RC1
     * @since 13.4.3
     * @since 12.10.9

   Optional<AverageRating> recomputeAverageRating(EntityReference reference)

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