Add new picard nonconvergence messages.

[dabail10]

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PR checklist

• Short (1 sentence) summary of your PR:
  Add additional information to the Picard nonconvergence subroutine.
• Developer(s):
  dabail10 (D. Bailey)
• 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.
  Compiles and runs in a single case.
• 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 CICE 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/.)
  • Yes
  • No, does the documentation need to be updated at a later time?
    • Yes
    • No
• Please provide any additional information or relevant details below:
  @eclare108213 @apcraig @akturner

[eclare108213]

Did you create a test case that fails to converge, to see the output? I had one earlier today... :)

[dabail10]

I did Elizabeth's test that failed and here is the new output:

picard convergence failed!

Surface: Tsf0, Tsf
0 -30.394500280862609 NaN

Snow: zTsn0(k), zTsn(k), zqsn0(k), ks(k), Sswabs(k)
1 -29.126564365877528 NaN -130462379.70299758 0.29999999999999999 N
aN

Ice: zTin0(k), zTin(k), zSin0(k), zSin(k), phi(k), zqin0(k), km(k), Iswabs(k), dSdt(k)
1 -27.564099780583771 NaN 12.702023524591246 9.9999999999997868E-003 4.9355390398570134E-0
02 -347653615.15351915 2.2130111244225201 NaN -0.0000000000000000
2 -22.154685027636670 NaN 11.455632525059242 9.9999999999997868E-003 5.0851638610074870E-002 -336188297.34063733 2.2103739869497430 NaN -1.4620410644527047E-007
3 -16.977709524760932 NaN 10.602935452517320 9.9999999999997868E-003 5.5262910678289388E-002 -324388027.44904798 2.2025991199295150 NaN -7.6949972318895542E-007
4 -12.071153928062893 NaN 10.215296112150895 9.9999999999997868E-003 6.4890647660878167E-002 -311592422.61542195 2.1856302334977022 NaN -1.7863746425062213E-006
5 -7.4629409422930024 NaN 10.377177159746095 9.9999999999997868E-003 8.5620377519279992E-002 -295998101.90322077 2.1490940846222690 NaN -3.2899607527392630E-006
6 -3.2591935367483966 NaN 11.501572730338641 9.9999999999997868E-003 0.20246276289361334 -252143615.80676761 1.9431593804000062 NaN -6.6003347617093794E-006
7 -1.4629218193533744 NaN 17.549948536680578 1.0000000000001563E-002 0.66671146031413986 -107241530.20791294 1.1249210511963286 NaN -1.2371149416801811E-005

Ice boundary: q(k)
0 0.0000000000000000
1 0.0000000000000000
2 0.0000000000000000
3 0.0000000000000000
4 0.0000000000000000
5 0.0000000000000000
6 3.6625816729655862E-009
7 0.0000000000000000

dt: 3600.0000000000000
hilyr: 0.26689513353862360
hslyr: 2.7771809939773200E-004
Tbot: -1.9045826499242646
fswint: NaN
fswsfc: NaN
rhoa: 1.2749999999999999
flw: 163.99059139784944
potT: 241.74623655913976
Qa: 1.8239307762786688E-004
Note: The following floating-point exceptions are signalling: IEEE_INVALID_FLAG
shcoef: 11.592313874064743
lhcoef: 29873.673214496353
qpond: 0.0000000000000000
qocn: -8242401.3874324420
Spond: 0.0000000000000000
sss: 34.000000000000000
w: 0.0000000000000000
flwoutn: NaN
fsensn: NaN
flatn: NaN
fsurfn: NaN
fcondtop: NaN
fcondbot: NaN
fadvheat: NaN

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(picard_solver) picard_solver: Picard solver non-convergence