Updated openstack/openstack
Project: openstack/requirements  f95555e53d01c4f1b93032847a0e0f1ed9185442

Add oslo.serialization

Add the new Oslo library for managing object serialization. This code is
moving out of the incubator into a library, so projects that wish to
continue using it need the requirement added to the global list first.

Change-Id: Iff29ce2e88cddc2332229cfbbc518251dd2c76f3