Update h5py to 3.3
Description
There are various minor fixes and improvements in h5py since 2.10. Probably none of them make a massive difference to us straight away, though we could look at reading/writing data while computation is going on now that it releases the GIL. But I've spent a fair bit of time working on h5py, and I'd like to see us using a recent version.
How Has This Been Tested?
Run AGIPD correction through xfel-calibrate (output in /gpfs/exfel/data/scratch/kluyvert/agipd-calib-900201-203-h5py-3.3).
I haven't tested all notebooks. But the biggest API change from 2.x is that h5py.File('abc.h5') opens files read-only by default. I've searched through the project for uses of File() without an explicit mode: there are only 2 (in src/cal_tools/dssclib.py and notebooks/LPD/playground/metroLib.py) and in both cases the file is only used for reading.