ACCUMULO-1179 make the accumulo instance directory the home by default

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1465108 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1179 make the accumulo instance directory the home by default

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1465114 13f79535-47bb-0310-9956-ffa450edef68