SOLR-6403: TransactionLog replay status logging.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1620168 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6419: The ChaosMonkey tests should use fewers jetty instances on non nightly runs.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1620170 13f79535-47bb-0310-9956-ffa450edef68