Merged revision(s) 1589394 from lucene/dev/trunk:
LUCENE-5626: Fix bug in SimpleFSLockFactory's obtain() that sometimes throwed IOException (ERROR_ACESS_DENIED) on Windows if the lock file was created concurrently

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1589397 13f79535-47bb-0310-9956-ffa450edef68