VOL-2241: Python 3 migration

 - update and remove unused requirements
 - use python/debian buster base image (includes pip)

Change-Id: I9d55f1c6ed87bbb1cee8e86fe66eb29797680f80
diff --git a/VERSION b/VERSION
index 3eefcb9..227cea2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.0
+2.0.0