Validate Primary Fuel Assignment

[grgmiller]

This PR advances work on #281 and fixes CAR-1890, CAR-1997:

• Exports the primary_fuel_table with all intermediate columns to outputs to help with validation.
• Adds a new validation check to flag when the plant primary fuel assigned by the pipeline does not match the capacity-based primary fuel assignment.
• Adds logging configuration to the sandbox notebook.

As noted in the documentation for the validation check:

Since we do not know exactly how plants are assigned to fuel categories in EIA-930, it is possible that the primary fuel we assign to the plant may differ from the primary fuel category used in EIA-930. The most likely source of this disconnect is if these plants are assigned a primary fuel based on the type of generation with the highest nameplate capacity (since this is relatively static over time), rather than based on fuel consumption (which may change year-to-year).

This test identifies where the primary fuel that the pipeline assigns would lead to the plant being categorized under a different fuel category than if a capacity-based method were used.

Plants flagged by this test are not necessarily incorrectly assigned, but rather this is intended to bring this issue to our attention as a potential source of inconsistency.

[gailin-p]

Adds a new validation check to flag when the plant primary fuel assigned by the pipeline does not match the capacity-based primary fuel assignment.

Could you add to #281 a comment of where to find this new output and how many plants are flagged?