Update HTML adapter to account for new structure.
Update HTML adapter to account for new structure.

  * The tab IDs in the HTML have changed
  * There are now combined top results; for the purposes of this test, they
    count as though they were on top of all tabs, since that is how the page
    appears to a user.

alphagov/rummager,theodi/rummager,alphagov/rummager,theodi/rummager