GEODE-5819: Reduce 16h40m wait on shutdown to intended 60 seconds.

[PurelyApplied]

• While this is unlikely to correct the Java11 SSL handshake failures, it should make tests currently hanging properly fail out so that a full failure-set can be analyzed.

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[PurelyApplied]

Upon some immediate look into the history, it looks like this was meant to be buffered out to something "longer than shutdown" but, I assume, not the 100x that it found. Maybe SHUTDOWN_WAIT_TIME * 2 would be sufficient? Any insight, @bschuchardt?

[bschuchardt]

I'm thinking the extra 10000ms was meant to address that concern. Multiplying by two is probably fine given how big of an interval we've been using :-)