(v6.x backport) test: refactor test-readline-keys
This is a backport of https://github.com/nodejs/node/pull/11281. This is required for https://github.com/nodejs/node/pull/16938 to land cleanly on v6.x.
Affected core subsystem(s)
test
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This is a backport of https://github.com/nodejs/node/pull/11281. This is required for https://github.com/nodejs/node/pull/16938 to land cleanly on v6.x.
test