Resolve "Graceful shutdown times out quite often"

Closes #127 (closed)

This was probably broken when we refactorred conf change loop and stopped batching conf change entries. Now we only process single conf change entries and the joint state gets resolved within a single iteration [citation needed]. We still should check if we're in the joint state though, because future changes could introduce conf change batching.

assigned to @gmoshkin

added 8 commits

• 66a57ec1...69f89b4c - 6 commits from branch master
• 30969c66 - test: add test for graceful shutdown
• 39fb55eb - fix: wasn't emitting raft.demoted when not in joint state

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changed the description

added 1 commit

• 448cb0ca - refactor: simplify checking joint state

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approved this merge request

added 4 commits

• 04e17d60 - 1 commit from branch master
• ddc0ef5b - test: add test for graceful shutdown
• 20f78220 - fix: wasn't emitting raft.demoted when not in joint state
• 71cb0388 - refactor: simplify checking joint state

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enabled an automatic merge when the pipeline for 71cb0388 succeeds

merged