[tracker] (18 commits) Non-fast-forward update to branch sam/explicit-ontology-paths

[Sam Thursfield <sthursfield src gnome org>]

The branch 'sam/explicit-ontology-paths' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  63d26f7... libtracker-data: Remove dead code in tracker-db-backup.[ch]
  bd34a80... libtracker-data: Remove accessor for removed forceJournal p
  1f3fd4a... Allow 'open with existing ontology', disable automatic re-i

Commits added to the branch:

  46ca75a... Remove Maemo ontology (*)
  2f32ee3... Remove tracker:defaultValue feature (*)
  6907e7c... trackertestutils: Use DConf instead of config files (*)
  461b42b... trackertestutils: Don't index applications by default (*)
  e330296... trackertestutils: Always start D-Bus daemon in a new sessio (*)
  4c3c72a... trackertestutils: Fix crash on SIGINT (*)
  8958ec1... README.md: Replace mailing-list link with discourse (*)
  c2b88be... Merge branch 'wip/jfelder/readme-discourse' into 'master' (*)
  1be3e8c... Merge branch 'sam/sandbox-improvements' into 'master' (*)
  cea00f6... functional-tests: Add tracker_test_main() (*)
  3673002... trackertestutils: Add some utils needed in tracker-miner te (*)
  e42f6f6... Merge branch 'sam/remove-maemo' into 'master' (*)
  d866550... Fix broken test in master (*)
  b6ccb52... Merge branch 'sam/test-utils' into 'master' (*)
  1508660... libtracker-data: Remove double error check (*)
  8dcc081... libtracker-data: Remove dead code in tracker-db-backup.[ch]
  bbd72ad... libtracker-data: Remove accessor for removed forceJournal p
  a0efd19... Allow 'open with existing ontology', disable automatic re-i

(*) This commit already existed in another branch; no separate mail sent