Removed commented out code related to playlist
Consolidated transcoding status update/thumbnail update into VideoServiceTask. Updated code in AuthenticationFilter to rename kaltura session id as ovpsessionId to make it more generic
Consolidated transcoding status update and thumbnail update task as VideoServiceTask. Updated code in authentication filter to use generic name to get ovp session
Merge branch 'feature/kaltura' of https://github.com/perfectsense/brightspot-cms into feature/kaltura

Conflicts:
	db/src/main/java/com/psddev/cms/db/VideoThumbnailUpdateTask.java
	db/src/main/java/com/psddev/cms/tool/AuthenticationFilter.java