Swagger don't handle multiple examples

[da-ekchajzer]

Bug description

Swagger do not handle multiple exemples.

To Reproduce

• In boaviztapi > routers > server_router.py

CHANGE 

def server_impact_by_config(server_dto: ServerDTO = Body(None, example=server_configuration_examples["DellR740"]), verbose: bool = True):

TO 

def server_impact_by_config(server_dto: ServerDTO = Body(None, examples=server_configuration_examples["DellR740"]), verbose: bool = True):

and add another server to boaviztapi > routers >openapi_doc > examples.py

server_configuration_examples = {
    "empty_server"':{}
    "DellR740": {...

You will be able to change the example in http://localhost:5000/docs#/server/server_impact_by_config_v1_server_server_impact_by_config_description_post
but the content of body won't change.

Expected behavior

When another example is selected, the body should change accordingly.

Additional context

FastAPI issue on the topic :
fastapi/fastapi#822