Model development: Resolve discrepancy between field name and field description for dataset_summary/std_dev_interval_betw_years

[kzollove]

As they are currently written in the model, the field name and field description for the variable std_dev_interval_betw_years within the dataset_summary table do not match.

Name implies standard deviation between years of the dataset while description implies standard deviation between the dates of the sampling events in the dataset.

Currently, L1 script creators are following the definition implied by the field name while determining std_dev_interval_betw_years, though perhaps it would make more sense and be more useful to start using the field description's definition as the authority (and possibly change the field name to not cause future confusion).