8171405: java/net/URLConnection/ResendPostBody.java failed with "Error while cleaning up threads after test"
Summary: test cleaned up to improve safe termination
Reviewed-by: michaelm, vtewari, dfuchs
Contributed-by: Julia Boes <julia.boes@oracle.com>
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test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
**/JTreport/**
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