Remove series number suffix from TT series titles
prevent NPE for missing TT policy dates
Remove episode number prefix from TT episode titles
Set TT description to longest available description
Don't fetch content for TT VOD picks content group

Instead of fetching content from TT only add references to content
which can be resolved since it has already been ingested.
Merge branch 'tt-fixes' into stage

* tt-fixes:
  Don't fetch content for TT VOD picks content group
  Set TT description to longest available description
  Remove episode number prefix from TT episode titles
  prevent NPE for missing TT policy dates
  Remove series number suffix from TT series titles