ACCUMULO-1115 catch race condition setting properties on a table that is being deleted

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1453998 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1115 catch race condition setting properties on a table that is being deleted

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1453999 13f79535-47bb-0310-9956-ffa450edef68