Which lead to find that double pendulum, hector and iris were not
tested.

Writing a test for hector raise:
> IOError: hector_description/robots/quadroto_base.urdf not found

Which lead to find that __main__ was missing the variations of icub &
ur5

In the previous version, changing NQ / NV, wouldn't change the test
results.

Also, we had a test checking that talos arm had a free flyer,
and another test checking that talos arm didn't had a free flyer.
Both were passing.

when it was useless otherwise

from https://github.com/ros-industrial/universal_robot/tree/kinetic-devel/ur_description