More stdint-type updates
Created by: germasch
I'm continuing my quest to explicitly use only stdint-based types in core and below.
This series updates format/bp3, format/bp4 and interop/hdf5 correspondingly, while also avoiding a good amount of repetitiveness by using ADIOS2_FOREACH_....
diffstat speaks for itself: 16 files changed, 321 insertions(+), 1412 deletions(-)
;)