I/O chapter not referencing processes as MPI processes

[mahermanns]

Problem

MPI I/O chapter not using MPI process

Proposal

Make consistent with the rest of the standard.

Changes to the Text

tbd.

Impact on Implementations

None.

Impact on Users

Improved readability through consistency

References and Pull Requests

[mahermanns]

@tonyskjellum @qkoziol @Shinji-Sumimoto

This came up in the MPI 5.0 RC meeting in Stuttgart, where I went through the I/O chapter and changed 'process' to 'MPI process' where I thought appropriate. Would you review the changes and let me know where to make changes?

[Shinji-Sumimoto]

I think these changes are good. How do you think, @tonyskjellum @qkoziol ?