Nhat Nguyen 44fdf2020a Always flush in FullClusterRestartIT#testRecovery ()
The pattern in the latest failure is similar to the source fixed in 
but relates to synced-flush. If peer recovery happens after indexing,
and indexing flushes some shard at the end, then a synced flush in the
test will not roll or commit translog.

Closes 
2019-10-02 18:03:22 -04:00
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