[tracker] (16 commits) Non-fast-forward update to branch sam/survive-missing-ontologies-gvdb

[Sam Thursfield <sthursfield src gnome org>]

The branch 'sam/survive-missing-ontologies-gvdb' 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:

  645a972... Don't abort when `~/.cache/tracker/ontologies.gvdb` is miss
  ef89b93... Fix crash in read-only mode when ontologies.gdvb is missing

Commits added to the branch:

  fda451e... functional-tests: Reformat in line with Python standards (*)
  ea80669... Merge branch 'sam/autopep8' into 'master' (*)
  69c3cf7... libtracker-data: Drop unconditional locks around wal checkp (*)
  59db520... libtracker-data: Do not cast doubles to strings (*)
  7d84c56... libtracker-data: Use g_ascii_dtostr/strtod to transform dou (*)
  bb88e1d... libtracker-data: Convert from GValues when generating solut (*)
  d47efdc... tests: Add test for double precision in deletes (*)
  5dca5b6... Merge branch 'wip/carlosg/double-precision' (*)
  deb12ca... libtracker-data: Remove pointless critical (*)
  0f43ce3... libtracker-miner: Do not check indexing tree on monitor eve (*)
  b3d7abf... libtracker-miner: Let non-indexable files trigger parent fo (*)
  fbb4050... libtracker-miner: Handle deletes of files triggering parent (*)
  044a75f... libtracker-miner: Drop TrackerMonitor API to get/set the in (*)
  af00543... Merge branch 'wip/carlosg/trigger-filter-parent-on-monitor- (*)
  ca0bb0d... Update Latvian translation (*)
  5e9ad3e... Fix crash in read-only mode when ontologies.gdvb is missing

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