LUCENE-5863: add 4.5.1

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1624069 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5863: add 4.4

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1624072 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5934: Fix backwards compatibility for 4.0 indexes.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1624073 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5863: add 4.3.1

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1624076 13f79535-47bb-0310-9956-ffa450edef68