SOLR-3755: Reverting r1467855 because it can mask timeout related problems in ChaosMonkeyShardSplitTest. Increasing read timeouts instead.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1468393 13f79535-47bb-0310-9956-ffa450edef68