http2: Proactively disconnect connections flooded by keepalive PING frames #13495
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Commit Message:
Proactively disconnect connections flooded by keepalive PING frames
Additional Description:
This PR adds error handling and associated tests for flood triggered in the ConnectionImpl::sendKeepalive() method. Previously connection stayed in the flooded state until downstream data was received.
Part of fixing #12280
Risk Level: Medium, H/2 codec
Testing: Unit and integration tests
Docs Changes: N/A
Release Notes: N/A
Signed-off-by: Yan Avlasov yavlasov@google.com