create a class to be used for unique objects. better for debugging and documentation than just using object() + remove unused unique objects Change-Id: I32f65960ea2fbee4fccbeb49a4e11176b7185aa0 Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/27455 Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de> Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de> Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>