Do not attempt to parse content as JSON in tests helper.

There is no reason to try to parse content as JSON anyway.
Manage tracks with names.
Fix data format in injection.
Complete tracks mapping.
Simplify code.
Fix wrong method call.
Don't raise an error on field parse with creating a track.
Fix track field creation.
Merge remote-tracking branch 'origin/topic/bf_fix_tests_helper' into develop

* origin/topic/bf_fix_tests_helper:
  Do not attempt to parse content as JSON in tests helper.
Release version v0.2.4-rc108.