[FIX] base_user_role: default roles

When granting access to a contact, a copy from Portal User Template
is made for it. But applied default roles are the ones from Default
User Template, causing an error when trying to assign both internal
and portal types to new user.

base_user_role/models/user.py

@@ -34,15 +34,21 @@ def _default_role_lines(self):
         default_user = self.env.ref("base.default_user", raise_if_not_found=False)
         default_values = []
         if default_user:
-            for role_line in default_user.with_context(active_test=False).role_line_ids:
-                default_values.append(
-                    {
-                        "role_id": role_line.role_id.id,
-                        "date_from": role_line.date_from,
-                        "date_to": role_line.date_to,
-                        "is_enabled": role_line.is_enabled,
-                    }
-                )
+            default_values = default_user._get_role_lines_vals_from_user()
+        return default_values
+
+    def _get_role_lines_vals_from_user(self):
+        self.ensure_one()
+        default_values = []
+        for role_line in self.with_context(active_test=False).role_line_ids:
+            default_values.append(
+                {
+                    "role_id": role_line.role_id.id,
+                    "date_from": role_line.date_from,
+                    "date_to": role_line.date_to,
+                    "is_enabled": role_line.is_enabled,
+                }
+            )
         return default_values
 
     @api.depends("role_line_ids.role_id")
@@ -97,3 +103,12 @@ def set_groups_from_roles(self, force=False):
                 vals = {"groups_id": groups}
                 super(ResUsers, user).write(vals)
         return True
+
+    def copy(self, default=None):
+        self.ensure_one()
+        portal_user = self.env.ref(
+            "base.template_portal_user_id", raise_if_not_found=False
+        )
+        if portal_user and self == portal_user:
+            default["role_line_ids"] = portal_user._get_role_lines_vals_from_user()
+        return super().copy(default=default)