Label AGIPD-500k with M0-M7 module numbers

[takluyver]

@tmichela @philsmt @daniloefl - does this look right? Do you think anyone will be upset to lose the QxMy numbering?

Closes #223.

[philsmt]

@tmichela Could you possibly ask about the labeling on the HED side? It was back then done on behalf of DET, so mileage may vary.

[tmichela]

Is the QxMy labeling actually used beyond the calibration services?

[takluyver]

For other detectors, the QxMy pattern is certainly used - e.g. see these docs for AGIPD at MID: https://rtd.xfel.eu/docs/agipd-manual-mid/en/latest/introduction.html#naming-convention

Whether it's specifically used for AGIPD 500k is the question at hand. 🙂

[tmichela]

Probably not, but who knows 🤷
To be safe, I'd maybe include both notation (QxMy (CHz)) but also that's probably not too important, so that's up to you.

[takluyver]

If we don't know of anyone using the QxMy notation for AGIPD 500k, and it does look like the Mx notation is used (I looked in Karabo), let's try this and see if anyone complains.