Updated openstack/openstack
Project: openstack/neutron  693cd76e6ce7a711bb5937fa78e864367b7c99f8

switch to oslo.serialization

jsonutils has been moved to the oslo.serialization library. in this
patch we bring in oslo.serialization and switch all references to
the new library.

Closes-Bug: #1385353
Change-Id: I2898c4040abb2f208959049708e7bc093cfbaba7