[IMP] energy_selfconsumption: contract generation improvment

Trello Card

Changelog

• [IMP] energy_selfconsumption: wizard view showing warning text
• [IMP] energy_selfconsumption: added start_date to generation wizard and used to create contracts with the selected date
• [IMP] energy_selfconsumption: constraint on start_date so can select a date inferior of three months before today (90 days).

energy_selfconsumption/models/__init__.py

@@ -5,4 +5,5 @@ from . import distribution_table
 from . import supply_point_assignation
 from . import project
 from . import contract
+from . import contract_line
 from . import product