Updated openstack/openstack
Project: openstack/nova  0b0716cf152d0c919c0a4fbcc145d84a0c305371
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Add API schema for v3 rescue 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 consistent for
the whole Nova API.

Partially implements blueprint nova-api-validation-fw

Change-Id: I3d08bc20e4c585dca1e218e8d97b208d158a3096