ACCUMULO-1053 move lease recovery check to isReady()

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1447829 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1053 move lease recovery check to isReady(), merge to new branch

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1447841 13f79535-47bb-0310-9956-ffa450edef68