Restoring nova_rebuild interpreter
Restoring nova_rebuild interpreter

When the license file was updated, the interpreter was accidently
dropped.  This re-adds it, however using /usr/bin/env python instead
of a direct path.

Change-Id: Iea77a55c88ab468e46bc411045012070f891e465

SpamapS/tripleo-ansible,SpamapS/tripleo-ansible