SOLR-6157: Hang occurred again, somewhere in tearDown ... changing the code to close the socket proxies after super.tearDown, if that doesn't work, I'll add the AwaitsFix back to the code to ignore this test.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1604868 13f79535-47bb-0310-9956-ffa450edef68