Updated openstack/openstack
Project: openstack/taskflow  22415f7c1ded1acdb3af40ee7b8a3ee2acc4a4ae

Properly handle and skip empty intermediary flows

Instead of linking nodes which have elements to
predecessors which do not we should search backwards
through the prior predecessors and link to one that
does have nodes; this ensures that we do not create
bad workflows when empty flows are injected.

Fixes bug 1392650

Change-Id: Ic362ef3400f9c77e60ed07b0097e3427b999d1cd