[IMP] energy_selfconsumption: add unit testing invoicing energy delivered

Related MR !247 (merged)

Changelog

• [IMP] energy_selfconsumption: added unit testing to energy delivered generation contracts

Roadmap

• Add unit testing cases for validations on energy_selfconsumption.invoicing.wizard

assigned to @DaniilDigtyar

approved this merge request

mentioned in commit dcfa12cf

merged

mentioned in merge request !277 (merged)

unassigned @DaniilDigtyar