[FIX] energy_selfconsumption: partner_id is the main partner to related to.

This change is detected from the constraint of supply_points_assignations (!181 (merged)) where it raises because it detects that the owner_id is not subscribed to the project.

energy_selfconsumption/models/partner.py

@@ -6,9 +6,14 @@ class ResPartner(models.Model):
 
     def _compute_supply_point_count(self):
         for record in self:
-            record.supply_point_count = len(record.supply_ids)
+            record.supply_point_count = len(
+                set(record.supply_ids + record.owner_supply_ids)
+            )
 
     supply_ids = fields.One2many(
+        "energy_selfconsumption.supply_point", "partner_id", readonly=True
+    )
+    owner_supply_ids = fields.One2many(
         "energy_selfconsumption.supply_point", "owner_id", readonly=True
     )
     supply_point_count = fields.Integer(compute=_compute_supply_point_count)
@@ -20,10 +25,11 @@ class ResPartner(models.Model):
             "name": "Supply Points",
             "view_mode": "tree,form",
             "res_model": "energy_selfconsumption.supply_point",
-            "domain": [("owner_id", "=", self.id)],
+            "domain": ["|", ("partner_id", "=", self.id), ("owner_id", "=", self.id)],
             "context": {
                 "create": True,
                 "default_owner_id": self.id,
+                "default_partner_id": self.id,
                 "default_country_id": self.env.ref("base.es").id,
             },
         }