Updated openstack/openstack
Project: openstack/taskflow  e782f9d3453203cb266f5788b9a63f3f549c4b52

Bump the deprecation version number

These will start to emit deprecation warning messages
in the next version/release (0.6) and not the current
version (0.5) so we should update the messaging to
reflect this.

Change-Id: I8823741847b42056690629fa12c612c8d1ef2cff