HDFS-2889. getNumCurrentReplicas is package private but should be public on 0.23 (see HDFS-2408). Contributed by Gregory Chanan.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1240415 13f79535-47bb-0310-9956-ffa450edef68