[tracker] (13 commits) ...tests/functional-test: Fixed insert or replace f. test for null support

[Philip Van Hoof <pvanhoof src gnome org>]

Summary of changes:

  f7a370a... libtracker-data: Add internal API for deleting all objects (*)
  12cfb48... libtracker-data: Support for insert or replace null objects (*)
  bb49d75... libtracker-data: Add stops and error handling for unsupport (*)
  68020d0... libtracker-data: Insert or replace's null support for multi (*)
  c8bfd5a... libtracker-data: Add some code comments for clarification (*)
  2308c4f... libtracker-data: Allow null upfront a new set for multivalu (*)
  7a70d4b... tests: Add functional test for insert or replace null suppo (*)
  aae3813... tests: Fix glitch in functional test (*)
  ebf2af5... libtracker-data: Make null,x,null,y,z work (*)
  55047fc... tests: Add functional test for multiple nulls use-case (*)
  b03ee91... tests: Fix whitespace issues in new test (*)
  d4fb5dd... libtracker-data: Cleanup of code after review (*)
  5aa0d2d... tests/functional-test: Fixed insert or replace f. test for  (*)

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