[tracker] (7 commits) Non-fast-forward update to branch sam/import-export

[Sam Thursfield <sthursfield src gnome org>]

The branch 'sam/import-export' 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:

  8ad0263... cli: Add `import` and `export` commands

Commits added to the branch:

  d75e7c2... libtracker-data: Remove dead code in tracker-db-backup.[ch] (*)
  6b50d1f... libtracker-data: Remove accessor for removed forceJournal p (*)
  03e6b8f... Add tracker_sparql_connection_new_with_ontology(), disable  (*)
  609933a... libtracker-data: Don't create double transactions in LOAD (*)
  ed7d809... libtracker-data: Fix crash when statement cache isn't initi (*)
  b86b79e... cli: Create read/write connection for tracker-sparql (*)
  778b3b6... cli: Add `import` and `export` commands

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