xml: XML modules should not be automatic

xml: XML modules should not be automatic

Those modules may require a lot of processing and there may be many of
them, so it is better to execute them on demand only.

Change-Id: Ide7819fe286c290be1c4aabda0c4283d6b6db788
Signed-off-by: Geneviève Bastien <gbastien+lttng@versatic.net>
Reviewed-on: https://git.eclipse.org/r/89134
Reviewed-by: Hudson CI
Reviewed-by: Jean-Christian Kouame <jean-christian.kouame@ericsson.com>
Tested-by: Jean-Christian Kouame <jean-christian.kouame@ericsson.com>