Updated openstack/openstack
Project: openstack/nova  9f3ac8e747e27c7b66b13f32f8fd9cab75e25bc0
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Add API schema for v3 multinic API

By defining the API schema, it is possible to separate the validation
code from the API method. The API method can be more simple.
In addition, a response of API validation error can be consistency for
the whole Nova API.

Partially implements blueprint nova-api-validation-fw

Change-Id: I62a55c498a1164ff56f82495f720cba67da8483b