monochromator: fix MonochromatorFixExitBase class constructor and other...
requested to merge 3164-monochromator-monochromatorfixexitbase-call-to-parent-class-wrong-arguments_19x into 1.9.x
monochromator: fix MonochromatorFixExitBase class constructor and other constructors to be compliant with generic plugin
Closes #3164 (closed)