Updated openstack/openstack
Project: openstack/taskflow  377ff71f7a25c43cd008a798597ed9e85e69571c

Add a couple of scope shadowing test cases

Since we now support symbol name shadowing we
should add a few test cases that ensure that
the correct shadowing order/capability is working
as expected.

Change-Id: I95bad23a33304ddbfa8715a00c913891d4c51f5d