[SEBA-946]

Fix Swagger documentation generation, update to Python 3

Change-Id: I0a55c4805a993dcac9f0721be87bbefbf8b9b348
diff --git a/VERSION b/VERSION
index fcdb2e1..05f4c08 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.0.0
+4.0.1-dev0