tests: Adds tests on exceptions from null Object usage.
tests: Adds tests on exceptions from null Object usage.

Change-Id: I11596f19c6eeb0c7cead972b7ecf1420c499d3fb
Reviewed-on: http://gerrit.aldebaran.lan/91437
Reviewed-by: vincent.palancher <f8ff75e1c61314c499fafa8de0d9e004e87e66b0@external.softbankrobotics.com>
Reviewed-by: jlamotte <70353e7b0c7d18b7fc75605daf0ccba69fcd3222@aldebaran.com>
Reviewed-by: jmonnon <8898eaf233516e520f996a244ca8a12d20f948b1@aldebaran.com>
Tested-by: vincent.palancher <f8ff75e1c61314c499fafa8de0d9e004e87e66b0@external.softbankrobotics.com>

aldebaran/libqi,aldebaran/libqi,aldebaran/libqi