SOLR-6157: Added some logging and re-opened the socket proxy to try to figure out why this test is hanging; reenabling temporarily to see if these changes help diagnose the cause of the hang.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1602924 13f79535-47bb-0310-9956-ffa450edef68