Servient top-level resource always returns an empty layer instead of available resources

Currently, the top-level resource provided by the servient is returning an empty array instead of the resources to access all available Things inside of the servient as it used to do. Please refer to [http://plugfest.thingweb.io:8083/](http://plugfest.thingweb.io:8083/) which should contain the three resources [http://plugfest.thingweb.io:8083/testthing](http://plugfest.thingweb.io:8083/testthing), [http://plugfest.thingweb.io:8083/counter](http://plugfest.thingweb.io:8083/counter) and [http://plugfest.thingweb.io:8083/smart-coffee-machine](http://plugfest.thingweb.io:8083/smart-coffee-machine). I was able to reproduce the same bug locally.