VID-1802 removing JWPlayer extension and old screenplay video handler
merging VideoSprint56 into VID-1802
VID-1802 removing postOnload flag as it was only used by JWPlayer
VID-1802 removing jwplayer messages
merging VideoSprint56 into VID-1802
Merge pull request #4674 from Wikia/VID-1802

Vid 1802