Fixes issue with missing avatar for Jigasi user. Fixes issue with avatar not being displayed when user has no video. Removed duplicated logic for checking video muted status(removed from LargeVideo which exists in SmallVideo).

Updates meet default installation. Removes nginx dependency and adds openjdk-8 in order to activate multiplexing inside jvb and use its jetty to serve meet. Updates will not touch current configuration which will continue using nginx.

Remove UI refs from xmpp and RTC

Conflicts:
	modules/xmpp/JingleSession.js
	service/xmpp/XMPPEvents.js

Fixes video switching issue. 'oldSmallVideo' field is no longer used as it is might be overwritten before fadeOut 'complete' callback of #largeVideo is called(and we miss UI update on it).

Fixes call to undefined method(which fixes crash on lastN switch and when clicking contact on the contactlist).