Change superfluous info logs to verbose

Change-Id: I89cf54996adf65354500bda3ac607d095b7bb3a0
Reviewed-on: http://gerrit.aldebaran.lan/50935
Reviewed-by: pdaouadi <pdaouadi@aldebaran-robotics.com>
Approved: tfontenay <tfontenay@aldebaran-robotics.com>
Tested-by: tfontenay <tfontenay@aldebaran-robotics.com>