AspNetCoreServer: make adding exception detail to http response opt-in

[duncanbrown]

Issue #, if available:
#886

Description of changes:
Current behaviour of AspNetCoreServer when an exception is thrown during request processing is to include details of that exception - specifically its type-name - in the HTTP response.
This seems insecure, so this change makes that something that must be opted-in to - by default, exception detail will not be returned in the response.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[ashishdhingra]

Should this PR be favored in place of #1007?

[normj]

Thanks for the PR. This PR has been released as part of version 8.0.0 of Amazon.Lambda.AspNetCoreServer. It was a major version bump due to the slight breaking change behavior.

[mungojam]

can you give a tip on how we set this to restore original behaviour? It doesn't seem to be a property on APIGatewayProxyFunction and it's not clear which functions inherit from the function class that the property has been added to.

[mungojam]

can you give a tip on how we set this to restore original behaviour? It doesn't seem to be a property on APIGatewayProxyFunction and it's not clear which functions inherit from the function class that the property has been added to.

my mistake, my project hadn't updated successfully. It is a property on APIGatewayProxyFunction after all