[tracker] (5 commits) Non-fast-forward update to branch wip/carlosg/joining-services

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/joining-services' 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:

  3cbd723... libtracker-data: Check binding type before printing variabl
  dd87d87... libtracker-sparql: Join services table queries on the right
  0c09db4... libtracker-data: Interpret bindings from a service table as
  7f31a0a... libtracker-data: Avoid repeated variables in remote service
  150cbc7... tests: Add libtracker-data test to test SERVICE queries

Commits added to the branch:

  9ad9aff... libtracker-data: Interpret bindings from a service table as
  6cbccee... libtracker-data: Check binding type before printing variabl
  ee8e257... libtracker-sparql: Join services table queries on the right
  888604b... libtracker-data: Avoid repeated variables in remote service
  957adee... tests: Add libtracker-data test to test SERVICE queries