debugInterfaceWrapper: removed cout
ControlBoardDumper: fixed 2 bugs

- default number of joints is changed from (0 1) to (0).
  This is because there is no check that list of joints asked by the
  user are or they are compatible with the availability of the robot
  (no check with getAxes). We can safely assume a wrapper has at least
  1 joint, but not 2. Testbench has just one.

- The debugIntterfaces functions were called with a for loop over six
  joints hardcoded because the "all joints" version of commands were
  not implemeted, causing crashes.
  Since the debugInterfaceWrapper was created, those functions were
  implemented as well, so the dumper is updated to use them.