Automatically load schema from previous/next step if it's WSDL/OpenAPI aware

[igarashitm]

Please describe the feature that you want to propose

Analyze the Camel route and detect source/target schema automatically where it's possible. For example, if the DataMapper is placed right before the API request based on Open API, the Target Body schema should be a request data shape of that API request.

cf.
#1850
#1851