Bring in bit-for-bit changes from master up to ctsm1.0.dev012: AnnEt init, snowmip fields

Bring in new diagnostic fields added by Justin Perket, Sean Swenson and Mark Flanner
for Snow-MIP. Most of those are fields that represent "Snow Free" data.

Also bring in fixes for a list of issues. Add handling of the new CO2 which includes
both latitude-band and global average versions. Add some changes to make it easier
for input data processing including NOT doing the slow 1km map file creation. Have
the number of steps that are skipped at startup dependent on the time-step size. Add
a test for some requirements of WACCMX (time-step and use of ESMF). Calculations of
local time are now done in a global subroutine, that can handle negative longitudes.
Fix how FFIX_TO_SMINN is handled for history output. The namelist logical "calc_human_stress_indices"
changed from logical to a character string of three values: FAST, NONE, ALL. FAST
is the default so the less expensive ones are output, NONE turns them all off, and ]
ALL does all of them including the expensive ones.

InitAccVars was mistakenly setting qflx_evap_tot_col rather than
AnnET. This fix allows us to remove now-redundant cold start and restart
code for AnnET.

CTSM Master Tag This Corresponds To: ctsm1.0.dev012