0c2d49a4f0
There will be many similarities with how we will be reading into the ChangeNotes from the traditional notedb ref for a change and how we will be reading draft comments from the users ref in the all users repository. Therefore, I made a super class for ChangeNotes, AbstractChangeNotes, that extends VersionedMetaData so that I can utilize those same methods and instance variables in the DraftCommentsNotes (or whatever it's called). Additionally, there was a method for reading comments from the tree of a commit inside the ChangeNotes.Parser, so I extracted that into the CommentsInNotesUtil so that I can reuse that method in the parser of DraftCommentsNotes (or whatever it's called). I had the option to either make the AbstractChangeNotes class a raw type with the actual inheritor extending Notes and specifying its own type or modify all callers to add an explicit cast to ChangeNotes whenever they use load(). I think that the former is the cleaner alternative, so that's what I did. Finally, the parseComments() method wasn't using the argument it was being passed so I got rid of that as well. Change-Id: I88513bdeb7d0ca8e4aba52254f2c3ccc10bd2ce1