Applied Karaf features to l2switch.

Change-Id: I55831747a4ed6b9650ab107c5e36183272406f44
Signed-off-by: André Martins <aanm@ua.pt>
Signed-off-by: Mathieu Lemay <mlemay@inocybe.com>
Signed-off-by: André Martins <aanm@ua.pt>