COMP: Added if to build hardware tests only if the cmake variable is set.
COMP: Added if to build hardware tests only if the cmake variable is set.

RabadanLab/MITKats,MITK/MITK,rfloca/MITK,danielknorr/MITK,danielknorr/MITK,fmilano/mitk,RabadanLab/MITKats,rfloca/MITK,lsanzdiaz/MITK-BiiG,MITK/MITK,iwegner/MITK,RabadanLab/MITKats,rfloca/MITK,NifTK/MITK,lsanzdiaz/MITK-BiiG,fmilano/mitk,lsanzdiaz/MITK-BiiG,RabadanLab/MITKats,NifTK/MITK,danielknorr/MITK,iwegner/MITK,MITK/MITK,rfloca/MITK,iwegner/MITK,iwegner/MITK,iwegner/MITK,danielknorr/MITK,iwegner/MITK,lsanzdiaz/MITK-BiiG,MITK/MITK,fmilano/mitk,lsanzdiaz/MITK-BiiG,NifTK/MITK,lsanzdiaz/MITK-BiiG,NifTK/MITK,RabadanLab/MITKats,NifTK/MITK,danielknorr/MITK,lsanzdiaz/MITK-BiiG,lsanzdiaz/MITK-BiiG,MITK/MITK,rfloca/MITK,fmilano/mitk,MITK/MITK,NifTK/MITK,fmilano/mitk,RabadanLab/MITKats,fmilano/mitk,danielknorr/MITK,fmilano/mitk,danielknorr/MITK,rfloca/MITK,rfloca/MITK