Add response schemas for show_instance_action 2.84

In microversion 2.84, the 'details' field was added to the GET
/servers/{server_id}/os-instance-actions/{request_id} API response.

Schemas had not been updated for this in the past, causing tests
calling the API with newer microversions to fail response schema
validation.

This adds the missing schemas.

Change-Id: I3d2b633dea44b6a29f9396366b2e6a5543027ab6
Signed-off-by: melanie witt <melwittt@gmail.com>
4 files changed