AtomPub GetRepositories mishandles repositoryId parameter

AtomPub GetRepositories.serve() asserts repositoryId != null and then a few lines later sets repositoryId = getStringParameter(request, Constants.PARAM_REPOSITORY_ID).

This causes problems in the following CmisAtomPubServlet.dispatch() code where the Dispatcher invokes AtomPub GetRepositories.serve() with a null repositoryId:

            if (pathFragments.length < 2) {
                // root -> service document
                dispatcher.dispatch("", METHOD_GET, context, service, null, request, response);
                return;
            }

The simple fix is to remove the repositoryId != null assertion from GetRepositories.serve().