fix - soft delete in quota binary tree & CO level of show organizations

apps/product/services/distribution_child.py

@@ -0,0 +1,13 @@
+import typing
+
+
+def get_all_distribution_child(distribution: object = None) -> typing.Any:
+    """
+    get all child of an distribution
+    """
+    descendants = []
+    children = distribution.children.all()  # noqa
+    for child in children:
+        descendants.append(child)
+        descendants.extend(get_all_distribution_child(child))
+    return descendants