This is a followup to #13950 in which the transport API is also
fatal-by-default.
Risk level: High (this will break anyone who is still using v2 and has
not enabled CLI or runtime override)
Testing: Various tests updated as described above. New unit test added
for bootstrap to server_test and to ads_integration_test for
dynamic rejection behavior. api_version_integration_test continues to
provide the definitive cross-version transport API integration test.
Release Notes: Same as #13950.
Signed-off-by: Harvey Tuch <htuch@google.com>
Mirrored from https://github.com/envoyproxy/envoy @ 9093131e2a01d368566741943e112fa629c96725