SOLR-4797: Shard splitting creates sub shards which have the wrong hash range in cluster state. This happens when numShards is not a power of two and router is compositeId

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_3@1480898 13f79535-47bb-0310-9956-ffa450edef68