make occtax marshmallow schemas importable

contrib/occtax/backend/occtax/schemas.py

@@ -1,6 +1,5 @@
 from datetime import datetime
 
-from flask import current_app
 from marshmallow import pre_load, post_load, pre_dump, fields, ValidationError
 from marshmallow_sqlalchemy.convert import ModelConverter as BaseModelConverter
 from shapely.geometry import asShape
@@ -15,6 +14,7 @@
 from geonature.core.gn_meta.schemas import DatasetSchema
 from geonature.core.gn_commons.schemas import MediaSchema
 from geonature.core.taxonomie.schemas import TaxrefSchema
+from geonature.utils.config import config
 from pypnusershub.db.models import User
 from pypn_habref_api.schemas import HabrefSchema
 
@@ -118,7 +118,7 @@ class Meta:
     observers = MA.Nested(
         ObserverSchema,
         many=True,
-        allow_none=current_app.config.get("OCCTAX", {}).get("observers_txt", True),
+        allow_none=config.get("OCCTAX", {}).get("observers_txt", True),
     )
     digitiser = MA.Nested(ObserverSchema, dump_only=True)
     dataset = MA.Nested(DatasetSchema, dump_only=True)