Set default years for 1PT to 2018 to 2019, and use DATM_YR variables for NEON

[ekluzek]

Set the default DATM_YR_* variables for 1PT streams to 2018 to 2019. For the NEON streams use the $DATM_YR_* settings rather than hardcoded values. This allows the case settings of the DATM_YR_* variables change the datm.streams.xml file.

Description of changes

Specific notes

Contributors other than yourself, if any:

CMEPS Issues Fixed (include github issue #):
Fixes #78

Are there dependencies on other component PRs: Yes CTSM
ESCOMP/CTSM#1278

Are changes expected to change answers? No

• bit for bit

Any User Interface Changes (namelist or namelist defaults changes)? No

• [x ] No

Testing performed:
Ran SMS_D_Vnuopc.CLM_USRDAT.I1PtClm51Bgc.cheyenne_intel.clm-NEON_NIWO
which worked and PASSes.

Hashes used for testing:

• CIME. cime5.6.43
• CMEPS v0.10.0
• CTSM: ctsm5.1.dev036-31-geb5f2e309 (NEON-compset PR Neon compsets CTSM#1278)

[jedwards4b]

@ekluzek This commit broke the test SMS_Vnuopc_Ld5_P1.1x1_mexicocityMEX.2000_DATM%1PT_SLND_SICE_SOCN_SROF_SGLC_SWAV_SESP.cheyenne_intel
which leads me to ask - why was the cdeps testlist not conducted for this PR?

[ekluzek]

Ok, obviously now I should have. I haven't run the cdeps test list before, but I can. I thought my changes were sufficiently confined that only the NEON test was needed. But, I suppose this is an example of why we have test lists, because sometimes unexpected things happen.