* 3.0.x. Historically, it logged and ignored a second addition of the same g/a/v/c/t. Now it replaces the file for
     * the artifact, so that plugins (e.g. shade) can change the pathname of the file for a particular set of
     * coordinates.
     *
     * @param artifact the artifact to add or replace.
     * @deprecated Please use {@link MavenProjectHelper}