ACCUMULO-1252 remove loaded files outside the threadpool

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1465688 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1252 remove loaded files outside the threadpool

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1465690 13f79535-47bb-0310-9956-ffa450edef68