tmf.xml: Use LinkedHashMap instead of HashMap

tmf.xml: Use LinkedHashMap instead of HashMap

The order in which the FSM are declared in the XML is important. Here,
we use a LinkedHashMap instead of a HashMap to conserve this order when
iterating through the FSMs.

Change-Id: I68837e8f8296741f20d1271d92c43b03ef90c986
Signed-off-by: Jean-Christian Kouame <jean-christian.kouame@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/77273
Reviewed-by: Genevieve Bastien <gbastien+lttng@versatic.net>
Tested-by: Genevieve Bastien <gbastien+lttng@versatic.net>
Reviewed-by: Hudson CI