Renaming all pixel multiplicity plots in event loader type modules for consistency
Fixes #71 (closed). Plots are named as follows:
- name = pixelMultiplicity
- title = Pixel Multiplicity per Corry Event
- X axis = # events
- Y axis = # pixels
Changed in the following modules:
EventLoaderATLASpix
EventLoaderCLICpix
EventLoaderCLICpix2
EventLoaderEUDAQ2
Other event loader modules did not contain a multiplicity histogram.