new_ESGgrid doesn't run

[danielabdi-noaa]

Description

new_ESGgrid doesn't run after #758
Attention: @chan-hoo

Steps to Reproduce

Run new_ESGgrid though run_WE2E_tests.sh

Additional Context

Machine: Hera
Compiler: Intel

Output

ERROR:
  From function:  "setup"
  In file:  "setup.sh"
  Full path to file:  "/scratch2/BMC/gsd-hpcs/Daniel.Abdi/ufs-srweather-app/regional_workflow/ush/setup.sh"
The domain name used in naming the run_post output files (POST_OUTPUT_DOMAIN_NAME)
has not been set:
  POST_OUTPUT_DOMAIN_NAME = ""
If this experiment is not using a predefined grid (i.e. if PREDEF_GRID_NAME 
is set to a null string), POST_OUTPUT_DOMAIN_NAME must be set in the SRW 
App's configuration file ("config.sh").
Exiting with nonzero status.

[chan-hoo]

@danielabdi-noaa, thank you for reporting this issue! I've submitted a PR to fix this issue.