Ensure interactives are augmented on live blogs

Since changed live blogs to have their own content type, we no longer augment interactives on those pages.

http://www.theguardian.com/football/2014/jul/13/world-cup-final-2014-countdown-live#block-53c2713be4b093fa8e0aac05

This fixes that. 

/cc @andymason