Add CSV loghandler

Change-Id: Ie93e4fedcb274d2f7aeba561a0c8ff08d4e3b944
Signed-off-by: Herve Cuche <hcuche@aldebaran.com>
Reviewed-on: http://gerrit.aldebaran.lan/48711
Reviewed-by: pdaouadi <pdaouadi@aldebaran-robotics.com>
Reviewed-by: ncornu <ncornu@aldebaran-robotics.com>
Approved: hcuche <hcuche@aldebaran-robotics.com>
Reviewed-by: hcuche <hcuche@aldebaran-robotics.com>
Tested-by: hcuche <hcuche@aldebaran-robotics.com>