Fix: remove bad UST header in consumer-timer.c

Signed-off-by: David Goulet <dgoulet@efficios.com>
[HEAD MERGE] Add -j/--jul to lttng UI and ABI

The JUL domain is set as unsupported in the session daemon so only the
client side is implemented.

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