For the case when the readback of a parameter does not reflect the
change immediately.
May also be used on Writable.target or Drivable.target with a short
BUSY period.
+ bug fix in an error message in frappy.datatypes.IntRange
Change-Id: I5e1c871629f9e3940ae80f35cb6307f404202b4a
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/31981
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>
