Farmer Modules CodeCov Improvements

[emjay0921]

Improvements on Farmer Modules Test Coverage:

• spp_farmer_registry_base
• spp_farmer_registry_demo
• spp_farmer_registry_dashboard

[SurajMarda]

I can solve this issue pls assign me

[jeremi]

Yes, you can work on this @SurajMarda see what was done in the PR first.