pyprodutil - Adding TOTAL_TASKS env var to specify MPI ranks for srun

[jimfrimel]

This issue is being tracked in Vlab.
See the link below for all information related to this issue.
It is only being placed as an issue here in order to track
it in the project board.

https://vlab.ncep.noaa.gov/redmine/issues/64425

[jimfrimel]

This change as been TESTED and COMMITTED to the SVN HWRF trunk repository.

Completed testing of the TOTAL_TASKS fix for the uncoupled forecast and updates with the most recent NCEPLIBS-pyprodutil changes.

The full HWRF workflow was run for 2 cycles, and a 12 hour forecast.
Michael 14L 2018100900-2018100906
and tested on:
Theia
t,u,s,v,x,k Jets

The coupled Forecast used all the default setting.

Atmospheric only was with these config changes.
config.run_gsi=no
config.run_ocean=no
config.run_relocation=no
config.run_ensemble_da=no

[jimfrimel]

WAITING...
2 close ....
Changes still need to be tested by other produtil users, accepted and than
committed to the VLab NCEPLIBS-pyprodutil git repository.