Dummy without couplers

[stavros11]

I have the impression that having another dummy without couplers may end up being useful for testing because most times we make a change in the couplers we break the non-coupler platforms.

[andrea-pasquale]

I also have the same feeling. As long as we can avoid duplicating code that much I also think that it would be beneficial to add a dummy coupler platform.

[Jacfomg]

The dummy2 return :)