reorder functions frzmlt_bottom_lateral and neutral_coeffs

[TillRasmussen]

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PR checklist

• Short (1 sentence) summary of your PR:
  reorder functions frzmlt_bottom_lateral and neutral_coeffsder to update CDN_ocn before it is used.
  This only changes results when formdrag is applied and fbot_xfer_type) == 'Cdn_ocn'.
• [ x] Developer(s):
  @TillRasmussen
• Suggest PR reviewers from list in the column to the right.
  @eclare108213 @apcraig @phil-blain
• Please copy the PR test results link or provide a summary of testing completed below.
  Not bit for bit when formdrag and Cdn_ocn are set. Otherwize bit for bit
• How much do the PR code changes differ from the unmodified code?
  • bit for bit
  • different at roundoff level
  • [x ] 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
• Please provide any additional information or relevant details below:
  Replaces Reorder calls to neutral_Coefficients and frzmlt_bottom_lateral - bugfix #380 cleaned up