Add edge time stamp age filter in all counting based algorithms. In the case of moment and user algorithms, their constructors in Scala will set the edge timestamp limit to Long.Max for now.
Move right node age filter from filter chain, RecentTweetFilter, to isEdgeUpdateValid function inside the algorithm. Again, in the case of moment and user, the right node age limit will be Long.Max for now.
Remove the defunct creationTimeInMillis and TimestampEdgeIterator in preference to new edge metadata.