MBST-4533 YouTube adapter
MBST-4533 YouTube adapter
Merge commit 'HEAD@{15}' into MBST-4533-youTubeAdapter

Conflicts:
	src/main/java/org/atlasapi/remotesite/youtube/YouTubeGraphExtractor.java
	src/main/java/org/atlasapi/remotesite/youtube/YoutubeUriCanonicaliser.java
	src/main/java/org/atlasapi/remotesite/youtube/entity/YouTubeModel.java
	src/main/java/org/atlasapi/remotesite/youtube/entity/YouTubePlayer.java
	src/main/java/org/atlasapi/remotesite/youtube/entity/YouTubeSource.java
	src/test/java/org/atlasapi/remotesite/youtube/YouTubeSourceTest.java