Enable supporting one-year-long simulation.

[YanchunHe]

For example:

/projects/NS2345K/noresm_diagnostics/bin/diag_run -m blom,cice -c1 NOIIAJRAOC20TR_TL319_tn14_20190710_repro -s1 1653 -e1 1653 -i1 /projects/NS2345K/cgu025/cases -c2 NOIIAJRAOC20TR_TL319_tn14_20190710 -s2 1653 -e2 1653 -o /projects/NS2345K/cgu025/noresm_diagnostics/

Then diag_run gives warnings like -

WARNING: end_year in NOIIAJRAOC20TR_TL319_tn14_20190710_repro is smaller than start_year: please correct this in blom_diag_template.sh.
-CHANGING CNTL CASE to NOIIAJRAOC20TR_TL319_tn14_20190710 in blom_diag_template.sh
-CHANGING CNTL to USER in blom_diag_template.sh
-CHANGING FIRST CLIMO YR IN CNTL CASE to 1653 in blom_diag_template.sh
WARNING: end_year of NOIIAJRAOC20TR_TL319_tn14_20190710 is smaller than start_year: please correct this in blom_diag_template.sh.
-SETTING UP TIME-SERIES DIAGNOSTICS FOR ENTIRE EXPERIMENT

At config.log it says -

At the very least, the following variables in blom_diag_template.sh must be configured prior to running the script:

NYRS_CLIMO1
NYRS_CLIMO2
(only if CNTL==USER)
TRENDS_ALL