Updated openstack/openstack
Project: openstack/python-novaclient  963484513de810cc5a96a91f9df24c8c21deb942

Use oslo.serialization

Since module `jsonutils` from common code is graduated in
`oslo.serialization`, we should remove code from oslo-incubator and use this
library.

Change-Id: Ia8b5ef598ff415cdde19f523a36a552918f9f94b