SERVER-46095 Must wrap WriteConcernOptions::SyncMode::JOURNAL w/ repl::ReplicationCoordinator::Mode::modeReplSet waitForWriteConcern specially with DurableTimestamp updates

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• Closed

SERVER-44180 replicationBatchIsComplete() should prompt the WiredTigerJournalFlusher thread to run instead of the _oplogJournalThreadLoop

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• Closed

SERVER-43417 Signal the flusher thread to flush instead of calling waitUntilDurable when waiting for {j:true}

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• Closed

SERVER-45792 Make StorageEngine::waitForJournalFlush interruptible

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• Closed

SERVER-45847 Pull the JournalFlusher out of the storage engine layer and place it above the storage engine

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• Closed