BHV-11000: Make both src and sourceComponents in enyo.Video works

Fixing: http://jira2.lgsvl.com/browse/BHV-11000

Issue:
'sourceComponents' in enyo.Video is used for clarifying multiple video format about same video file such 'mp4', 'webm' and 'ogv'. However, some functions for handling the property was erased.

Fix:
Recover codes related to video sources and makes them bindable from player.

DCO-1.1-Signed-Off-By: Kunmyon Choi kunmyon.choi@lge.com