Fix: wrong behavior of save command when no session name is provided

No session name and no option --all should default to --all.

Signed-off-by: Jonathan Rajotte Julien <jonathan.r.julien@gmail.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
[HEAD MERGE] Disable JUL event on UST side

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