ben-manes / caffeine / #5618

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Write before publishing the expired prior in jcache invoke

postProcess published a lazily-expired prior's EXPIRED event and counted
the eviction before the action switch's abortable writer and copier. On
an expired prior whose processor creates, loads, or deletes, a failing
writer (or non-serializable value) then aborted the compute with the
expired mapping still present and the listener already notified, so the
next touch re-fired it: duplicate event and eviction for one expiration.

Keep classifying the expired prior as absent for the switch, but defer
publishing its EXPIRED and counting the eviction until after each
terminal action's writer/copier, matching put. READ and UPDATED cannot
co-occur with an expired prior, and invoke's writer-before-copy order is
unchanged.

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