story #7393: code clean

- changed public methods to private to avoid having two methods that do the same thing and lead to confusion (which one to use and why).
- removed dependency on empty parent method- code should always have a purpose and this was just leading to questions without answers.

Change-Id: If4ef9511ff74099e65a4fe8bb5abf0fcd1696d5f
story #7393: adding info for fts tracker events when event name needs clarity

Change-Id: I14400b1c6e7897fe77f0873682f36e0f86e534a1
Merge commit 'refs/changes/93/3193/2' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  story #7393: adding info for fts tracker events when event name needs clarity
  story #7393: code clean

Change-Id: Ia1cfaf47d6c08e427db12364f21df9cee2c6bafb
This is Tuleap 7.6.99.42

Change-Id: I2fa7abf5f9c5d57325d41a32d3bb6d804a4ddfef