[11] RFR 8207368: Race with ConcurrentHashTable deleting items on insert with cleanup thread

[Kim Barrett]

> On Jul 16, 2018, at 7:10 PM, coleen.phillimore at oracle.com wrote:
> 
> This is a straight export/import from the change checked into jdk12:
> 
> https://bugs.openjdk.java.net/browse/JDK-8206471
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/8207368.01/webrev
> 
> Tested with hs-tier1,2.
> 
> Thanks,
> Coleen

Looks good.