MB-100: SyntaxError in xdcr.biXDCR.bidirectional.load_with_async_ops

Change-Id: I1d9acfa93578daef35ec7917a70d91b30c3dd83b
Reviewed-on: http://review.couchbase.org/24680
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>