correct ks units, clean up comments, bug fix for BL99 enthalpy calculation

[eclare108213]

• [x] Short (1 sentence) summary of your PR: Bug fix for BL99 and minor cleanup:

• correct ks units in dEdd code

• clean up comment statements

• uncomment enthalpy calculation when temperature is adjusted, for BL99 thermo (bug fix)

• [x] Developer(s): @eclare108213

• [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. base_suite is BFB:

  196 measured results of 196 total results
  196 of 196 tests PASSED
  0 of 196 tests PENDING
  0 of 196 tests MISSING data
  0 of 196 tests FAILED

  It's likely that results with BL99 thermo will not be BFB if/when the bug fix condition is hit.

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

  • [x] bit for bit except for BL99 bug fix (occasionally)
  • [ ] 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: Closes https://github.com/CICE-Consortium/Icepack/issues/450

[apcraig]

This looks fine. Would you like me to run a regression test suite?

[eclare108213]

I have a base_suite regression test running now - looks good so far.

[eclare108213]

base_suite came back fully BFB, although results could change in longer runs with BL99. Ready for review/merge.