ACCUMULO-1264 add a little upgrade to move !METDATA file deletion markers to the root tablet

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1468576 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1264 add a little upgrade to move !METDATA file deletion markers to the root tablet

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1468577 13f79535-47bb-0310-9956-ffa450edef68