Fix: send disable ALL command code if event is *

$ lttng disable-event -a
and
$ lttng disable-event '*'

Both commands should do the same meaning send the DISABLE_EVENT_ALL
command to the session daemon.

Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: disable event for JUL domain

Could not be backported from master. Ref. commit is
0dcfcf94b356c12e3936fa27f350896d96724e4e

This fixes the disable event for JUL that was not working and fixes the
buggy test.

Signed-off-by: David Goulet <dgoulet@efficios.com>