Update URDFs with the hands' models and with correctly placed meshes

[ruipimentelfigueiredo]

No description provided.

[plinioMoreno]

Please @jsbruglie check the difference between the current files in the master branch (meshes + urdf) vs. the ones generated today by @vicentepedro and @rnun3s, and then test both on them on the robot.

@rnun3s is creating the left hand, so on the next week we should get rid of this issue.

[vicentepedro]

@ruipimentelfigueiredo pointed out: It's important to maintain the convention used in the older hand version to simplify the rest of the 'new hands' integration process (moveit, controllers, etc...)
@jsbruglie can you check this? and let me know if there is a huge mismatch. Then, I and @rnun3s can change the joint names in the generation of the URDF (in solid works) as well, to have a smoother generation pipeline. ;)

[joao-borrego]

Has this not been fixed :P ?