maintask writes CMEPS restart log

[NickSzapiro-NOAA]

Commit Queue Requirements:

• Fill out all sections of this template.
• All sub component pull requests have been reviewed by their code managers.
• Run the full Intel+GNU RT suite (compared to current baselines) on either Hera/Derecho/Hercules
• Commit 'test_changes.list' from previous step

---

Description:

#2698 enabled writing of a log file to indicate that CMEPS has completed writing a restart file. If all mediator tasks do this for the same file, there are race conditions. So different tasks aren't opening and closing same filename, add 1 line change so that only if maintask call log_restart_fh

Commit Message:

  * CMEPS - if maintask call log_restart_fh

Priority:

• Critical Bugfix: Model can fail. Easy to merge with other PRs

Git Tracking

UFSWM:

• Closes #Race condition in calling log_restart_fh NOAA-EMC/CMEPS#144

Sub component Pull Requests:

• CMEPS: if maintask call log_restart_fh NOAA-EMC/CMEPS#143

UFSWM Blocking Dependencies:

• None

Documentation:

• No documentation update is required for this PR (please explain).

---

Changes

Regression Test Changes (Please commit test_changes.list):

• No Baseline Changes.

Input data Changes:

• None.

Library Changes/Upgrades:

• No Updates

---

Testing Log:

• RDHPCS
  • Hera
  • Orion
  • Hercules
  • GaeaC6
  • Derecho
• WCOSS2
  • Dogwood/Cactus
  • Acorn
• CI
• opnReqTest (complete task if unnecessary)