Fix bug in dataservice use of obj store settings.

Fixing usage of ServiceSetting object in service's main lifespan() func,
as use was of earlier names for properties, which were changed in code
review but not updated here; also bumping package version.

python/services/dataservice/dmod/dataservice/_version.py

@@ -1 +1 @@
-__version__ = '0.9.0'
+__version__ = '0.9.1'

python/services/dataservice/dmod/dataservice/rest_service.py

@@ -65,8 +65,8 @@ async def lifespan(app: FastAPI):
     object_store_dataset_manager = _init_object_store_dataset_manager(
         obj_store_host=settings.object_store_host,
         port=settings.object_store_port,
-        access_key=settings.object_store_username,
-        secret_key=settings.object_store_passwd,
+        access_key=settings.object_store_exec_user_name,
+        secret_key=settings.object_store_exec_user_passwd,
     )
     dataset_manager_collection.add(object_store_dataset_manager)
 
@@ -77,8 +77,8 @@ async def lifespan(app: FastAPI):
 
     docker_s3fs_plugin_helper = _init_docker_s3fs_plugin_helper(
         dataset_manager_collection=dataset_manager_collection,
-        access_key=settings.object_store_username,
-        secret_key=settings.object_store_passwd,
+        access_key=settings.object_store_exec_user_name,
+        secret_key=settings.object_store_exec_user_passwd,
         settings=settings,
     )