LUCENE-5904: first cut at gen inflation to prevent index corruption when files are re-used after first IW has unclean shutdown and 2nd IW encounters virus checker

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5904@1620753 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5904: set MDW back to try to provoke more fails

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5904@1620755 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5904: remove sop

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5904@1620756 13f79535-47bb-0310-9956-ffa450edef68