Add symmetry test and gridsys_suite

[apcraig]

PR checklist

• Short (1 sentence) summary of your PR:
  Add some symmetry tests including ability to set uniform forcing

• Developer(s):
  apcraig, daveh150

• Suggest PR reviewers from list in the column to the right.

• Please copy the PR test results link or provide a summary of testing completed below.
  PASS cheyenne_intel_smoke_gx3_8x2_diag1_run5day test
  PASS cheyenne_intel_smoke_gx3_8x2_diag1_run5day compare cice.aaf392b909.211113-095011 8.85 2.22 2.71
  PASS cheyenne_intel_restart_gx3_4x2_debug_diag1 test
  PASS cheyenne_intel_restart_gx3_4x2_debug_diag1 compare cice.aaf392b909.211113-095011 126.75 68.66 45.59
  PASS cheyenne_intel_smoke_gbox80_1x1_boxslotcyl test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxslotcyl compare cice.aaf392b909.211113-095011 13.06 0.00 3.14
  PASS cheyenne_intel_smoke_gbox80_1x1_box2001 test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxsymn test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxsyme test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxsymne test
  PASS cheyenne_intel_smoke_gx3_8x2_diag1_gridcd_run5day test
  PASS cheyenne_intel_restart_gx3_4x2_debug_diag1_gridcd test
  PASS cheyenne_intel_smoke_gbox80_1x1_box2001_gridcd test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxslotcyl_gridcd test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxsymn_gridcd test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxsyme_gridcd test
  PASS cheyenne_intel_smoke_gbox80_1x1_boxsymne_gridcd test

• How much do the PR code changes differ from the unmodified code?

  • bit for bit
  • different at roundoff level
  • more substantial

• Does this PR create or have dependencies on Icepack or any other models?

  • Yes
  • No

• Does this PR add any new test cases?

  • Yes
  • 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/. A test build of the technical docs will be performed as part of the PR testing.)

  • Yes
  • No, does the documentation need to be updated at a later time?
    • Yes
    • No

• Please provide any additional information or relevant details below: