analysis.lami: Replace Activator info logging with JUL

analysis.lami: Replace Activator info logging with JUL

That way the commands that are run every time a kernel trace
is opened won't show up systematically in the command-line
output.

We can continue logging critical errors to the Activator for now.

Change-Id: Ifa0c9dfabe89f20747776366cced22ff12caca71
Signed-off-by: Alexandre Montplaisir <alexmonthy@efficios.com>
Reviewed-on: https://git.eclipse.org/r/76671
Reviewed-by: Hudson CI
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>