[IndirectDiff] Remove warning message from OSIRISDiffractionReduction

[mantid-builder]

Original Reporter: Samuel Jackson

Reported by Franz Demmel. The following warning shows up when running OSIRISDiffractionReduction with the standard calibration file.

AlignDetectors started (child)
2 errors (invalid Detector ID's) found when reading .cal file 'C:/opengenie/larese/osiris_041_RES10.cal'.
AlignDetectors successful, Duration 0.16 seconds

I've investigated this and it appears this is simply down to the fact that the monitors are included in the calibration file and when align detectors runs it cannot find anything with an ID matching the monitor.

The best option here would be to check if it's a monitor at the level that's appropriate and simply ignore them.

[mantid-builder]

This issue was originally trac ticket 8629