leap year problem

When running with `--res NLDAS_NLDAS --compset RM` the model appears to fail when it hits 28th Feb on a leap year. From the `lnd` log file:

> (dlnd_comp_run) lnd: model date 19760227 82800s
(dlnd_comp_run) lnd: model date 19760227 84600s
(dlnd_comp_run) lnd: model date 19760228 0s
(shr_dmodel_readstrm) file ub: /pic/projects/climate/csmdata//lnd/dlnd7/NLDAS/Livneh_NLDAS_1970_2011.nc 1886
(shr_strdata_advance) ERROR: for stream 1
(shr_strdata_advance) ERROR: dt limit1 2.00000000000000
1.00000000000000 1.50000000000000
(shr_strdata_advance) ERROR: dt limit2 19760228 0 19760301

Is there an option in the CIME config for telling the model that the Livneh input data contains leap years?

(working on apcraig/mosart/add-inundation branch)

Start with the lnd log entry from dlnd_comp_run and trace the reported error from shr_strdata_advance while using the Livneh_NLDAS_1970_2011.nc input. Check the CIME configuration and stream handling for an option that controls leap-year dates; done means the NLDAS_NLDAS/RM case advances past 19760228 without the dt-limit error.

Written by the indexing model from the issue text.