Updated openstack/openstack
Project: openstack/taskflow  1096622b61077c26c78204dbf944f0dacc486796

Fix multilock concurrency when shared by > 1 threads

Instead of raising thread errors when another thread
has locks that the consuming thread wants to use just
block and wait and release the correct locks on release
to match the expected vs observed behavior.

This makes it so that a single multilock object can be
shared by many threads and each thread using the object
will correctly obtain and release as expected...

Fixes bug 1371814

Change-Id: Ia21a05fe9249fa019a09c4f30beeb0770ded5150