Show the legal value range

[JunCEEE]

  File "/beegfs/desy/user/juncheng/SFX/johan/r01/./SFX.py", line 15, in <module>
    cdc.parameters["number_of_diffraction_patterns"] = 1
  File "/gpfs/exfel/data/user/juncheng/libpyvinyl/libpyvinyl/Parameters/Collections.py", line 131, in __setitem__
    self.parameters[key].value = value
  File "/gpfs/exfel/data/user/juncheng/libpyvinyl/libpyvinyl/Parameters/Parameter.py", line 259, in value
    raise ValueError("Value of parameter '" + self.name + "' illegal.")
ValueError: Value of parameter 'number_of_diffraction_patterns' illegal.

Here it's better to show the legal value range, instead of only a prompt.