Description of changes

• Megan changes without the fire emissions commits.
• updated testlist for aux_noresm_clm
• removal of ctsm5.1
• updates of submodules to be consistent with upcoming noresm2_5_alpha08 tag

Specific notes

Same notes as the previous now closed PR
#74

Contributors other than yourself, if any: @rosiealice (the primary developer of these changes)

CTSM Issues Fixed (include github issue #):
#36

Are answers expected to change (and if so in what way)?
Yes, all the MEG_* fields will change, but nothing else.

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

Does this create a need to change or add documentation? Did you do so?
Yes, but haven;'t changed yet pending further coupled model testing.

Testing performed, if any:
Ran the following test command:
./create_test --xml-category aux_clm_noresm --xml-machine betzy --baseline-root ~/baselines/ctsm_develop --generate noresm2_5_alpha08 --test-id ctsmpr1 --project nn9039k -o

    FAIL ERS_Ld761.ne30pg3_ne30pg3_mtn14.2000_DATM%GSWP3v1_CLM60%FATES-NOCOMP_SICE_SOCN_MOSART_SGLC_SWAV.betzy_intel.clm-FatesColdNoComp RUN time=2995
    FAIL SMS_D.1x1_brazil.2000_DATM%GSWP3v1_CLM60%FATES-SP_SICE_SOCN_SROF_SGLC_SWAV.betzy_intel.clm-FatesColdDryDepSatPhen RUN time=56
    FAIL SMS_D_Ld3.ne30pg3_ne30pg3_mtn14.2000_DATM%GSWP3v1_CLM60%FATES-SP_SICE_SOCN_SROF_SGLC_SWAV.betzy_intel.clm-FatesColdSatPhen_prescribed RUN time=62

All the other tests passed.