Update Earth radius to the CIME value

[xylar]

Currently, COMPASS uses 3 different Earth radii. With this merge and a corresponding update to MPAS-Tools, all Earth radii are the CIME value.

This PR addresses #549 along with MPAS-Dev/MPAS-Tools#341.

[xylar]

@mark-petersen and @sbrus89, this PR will be rebased once #577 is merged. This PR is needed before #668, #669, and #671 can go in, so it is also a priority.

[xylar]

These changes are not bit-for-bit so I could use some help thinking about how to test them.

[xylar]

Testing on Grizzly

Verification that the test runs to completion:

• Gaussian_hump/USDEQU120cr10rr2/build_mesh/
• coastal/Maine/init
• coastal/USDEQU120cr10rr2/build_mesh
• global_ocean/ARM60to10/init
• global_ocean/CA120to3/build_mesh
• global_ocean/EC60to30/init
• global_ocean/EC60to30wISC/init
• global_ocean/HI120to12/build_mesh
• global_ocean/QU240/init
• global_ocean/QU240wISC/init
• global_ocean/SO60to10wISC/init
• global_ocean/WC12/init
• global_ocean/WC14/init
• hurricane/USDEQU120at30cr10rr2/build_mesh
• hurricane/USDEQU120at30cr10rr2WD/build_mesh
• hurricane/USDEQU120at30cr10rr2WD_veg/build_mesh
• hurricane/USDEQU240at60cr20rr4/build_mesh
• hurricane/USDEQU240at60cr20rr4WD/build_mesh
• hurricane/USDEQU240at60cr20rr4WD_veg/build_mesh
• hurricane/USDEQU60at15cr5rr1/build_mesh
• hurricane/USDEQU60at15cr5rr1WD/build_mesh
• hurricane/USDEQU60at15cr5rr1WD_veg/build_mesh
• hurricane/USDEQU60at15cr5rr500WD/build_mesh
• tides/USDEQU120at30cr10/build_mesh

[xylar]

global_ocean/SO60to10wISC/init is failing during SSH adjustment. I wonder if this might be related to #676. I'm going to see if it works with a test merge of that PR.

[mark-petersen]

See #577 (review)

[mark-petersen]

Yes, I cherry-picked #676 for spin-up steps. I'll get that one on soon.

[mark-petersen]

See initial state plots: #577 (comment)

[sbrus89]

Approved, based on inspection of hurricane/USDEQU240at60cr20rr4WD case.

[xylar]

Thanks very much @sbrus89 and @mark-petersen for the review.