Under very heavy load with many thousands of batch job submissions
or job signals, the write lock can be held for very long periods of
time preventing job scheduling, squeue response, etc. This code
inserts a timing break to permit other functions to get the locks.

default and appeared to break other things.

specified.

and thread id. Remove trailing spaces.

is beaing installed. Remove unused variables in the mpi2 util file.

This new slurm macro truncates the formatted time instead

code to keep the same logic as the original PMI2 library
implementation.