Fixes issue with the new GSP having the national forecast as GSP ID 0, which messes up some filtering. Also updates the GSP data in the tests to use the new GSP data
Fixes #716
How Has This Been Tested?
Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.
Please also list any relevant details for your test configuration
[ ] Yes
If your changes affect data processing, have you plotted any changes? i.e. have you done a quick sanity check?
Pull Request
Description
Fixes issue with the new GSP having the national forecast as GSP ID 0, which messes up some filtering. Also updates the GSP data in the tests to use the new GSP data
Fixes #716
How Has This Been Tested?
Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration
If your changes affect data processing, have you plotted any changes? i.e. have you done a quick sanity check?
Checklist: