LUCENE-5418: fix typo

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5376@1564765 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5376: minor cleanups in replication

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5376@1564769 13f79535-47bb-0310-9956-ffa450edef68