TestSortingMergePolicy: Don't call IndexWriterConfig.clone (LUCENE-4876) and make analysis deterministic (doesn't solve all problems yet, merged from r1460248).


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1460249 13f79535-47bb-0310-9956-ffa450edef68