Fix request #5447: Fatal error in error logs but no visual effect

If there are projects with invalid configuration, then the systray
won't be generated since it throws a fatal error. Now we silently ignore
such projects and generate the systray.

Change-Id: I5d55718f659dd80bab3f1c6194a1ea70737089b1
Merge commit 'refs/changes/39/1339/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix request #5447: Fatal error in error logs but no visual effect

Change-Id: I807107b4a846457900f62877d6c7a627c8c0cc8f
This is Tuleap 6.6.99.5

Change-Id: I6d057c4ffcccedc7d47301b994b2aeb76ad1577c