Fixed adapter calls in SFU and added bridge hooks for kurento listen only

...luebutton-html5/client/compatibility/kurento-extension.js

...uebutton-html5/imports/api/audio/client/bridge/kurento.js

...-html5/imports/ui/components/video-provider/component.jsx

labs/bbb-webrtc-sfu/config/default.example.yml

labs/bbb-webrtc-sfu/lib/mcs-core/lib/model/MediaSession.js

labs/bbb-webrtc-sfu/lib/mcs-core/lib/model/SdpSession.js