Reenable the icub-model-test on iCub3

[GiulioRomualdi]

As discussed with @traversaro we should reenable the test on icub3 in order to avoid regressions such as robotology/icub-models#70.
This model can be used as desiderata for the joints direction.

cc @traversaro and @Nicogene

[traversaro]

In particular, it is important because of how the Creo/Simmechanics generation works, the direction of the exported axis and hence the list of joints to keep in the reverseRotationAxis list will change, and without a test that checks if the axis direction is correct, we never know if the model is correctly regenerate.

An example is the PR #172, that contained a new generated model, that cause the regression described in robotology/icub-models#70 .

[GiulioRomualdi]

Hi @traversaro and @Nicogene
Is there any plan for this? I'm really afraid that robotology/icub-models#70 will happen again in the future

[traversaro]

Hi @GiulioRomualdi, I am not aware if this is already planned to work, probably @Nicogene can provide more info on this.