The command 'setposition' wasn't sane declared so the use of one of the
devices using this command lead always to a ProgrammingError during the
'describe' command via the server interface.
Change-Id: I34a6b07e8f0fbd861496515a5e18d3181ad134d5
Reviewed-on: https://forge.frm2.tum.de/review/17715
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Tested-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>