block explict breaks domain reproducibility

[DeniseWorthen]

Describe the bug

This work is related to UFS Issue 1556

Prior to the merge of the WISE PR (#888), I tested the changes in my feature branch for the unstructured mesh extension to the mesh cap. Not being a wave modeler however, it did not occur to me that I needed to create a new mod_def to flip namelist switches. So I made my test using the wrong settings.

@aliabdolali provided me the correct values for the unstructured mesh + explicit from the standalone regtest (ww3_ufs1.1/input_unstr/ww3_grid_b.inp)

When I re-tested with an appropriate mod_def, the domain-decomposition test in my ATM-WAV case now failed. The difference in the exported Z0 between a 5PE and 10PE case is shown below

Clearly a ghost update is missing. I have a fix and will open a PR.