Modify fsd12 test run length

[apcraig]

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PR checklist

• [X] Short (1 sentence) summary of your PR: Modify fsd12 test length
• [X] Developer(s): apcraig
• [X] Suggest PR reviewers from list in the column to the right.
• [X] Please copy the PR test results link or provide a summary of testing completed below.

  621 measured results of 621 total results
  615 of 621 tests PASSED
  0 of 621 tests PENDING
  6 of 621 tests MISSING data
  0 of 621 tests FAILED

• How much do the PR code changes differ from the unmodified code?
  • [X] bit for bit
  • [ ] different at roundoff level
  • [ ] more substantial
• Does this PR create or have dependencies on CICE or any other models?
  • [ ] Yes
  • [X] No
• Does this PR add any new test cases?
  • [ ] Yes
  • [X] No
• Is the documentation being updated? ("Documentation" includes information on the wiki or in the .rst files from doc/source/, which are used to create the online technical docs at https://readthedocs.org/projects/cice-consortium-cice/.)
  • [ ] Yes
  • [X] No, does the documentation need to be updated at a later time?
    • [ ] Yes
    • [X] No
• [X] Please provide any additional information or relevant details below:

fsd12 tests were timing out on some machines, this just provides a longer runtime.

[apcraig]

Unilaterally merging without review.