Raise oslo.messaging to 1.3.0

We prefer released versions to be required.

Change-Id: Ifafbae3dfbc27f5ac2005051dbfc73d134a0a57a
Taskflow 0.2 released

Taskflow 0.2 has released and should work with all
existing openstack projects as-is (integrating gating
has verified this) so unbinding and resetting the bound
at 0.3 (which does not exist yet).

Change-Id: I1e6f782c5cc6e9c54be0efc089f2876357240ac7
Merge "Taskflow 0.2 released"