Merged revision(s) 1592914 from lucene/dev/trunk:
LUCENE-5640: Refactor Token, add new PackedTokenAttributeImpl, make use of Java 7 MethodHandles in DEFAULT_ATTRIBUTE_FACTORY

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1592929 13f79535-47bb-0310-9956-ffa450edef68