SOLR-6257: More than two "!"-s in a doc ID throws an ArrayIndexOutOfBoundsException when using the composite id router. (merged trunk r1611934)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1611940 13f79535-47bb-0310-9956-ffa450edef68