e4ae7e91dc
this schema tells us host is required https://github.com/openstack/nova/blob/master/nova/api/ openstack/compute/schemas/migrate_server.py#L33 and also param say it's required, but the doc says 'if you omit' will misleading user ,actually, user can't omit it, they need to input null to let scheduler decide Implements: blueprint api-ref-in-rst-ocata Change-Id: I2661c85f32eff8e199856635a4c40a494a5decb6