CBQE-0: minor fix in conf/py-newupgrade.conf

Change-Id: Id53f82d3071cd0da5619d277e66a689e2aaa9496
Reviewed-on: http://review.couchbase.org/26259
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>