ACCUMULO-1537 close batch scanners in tests

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1502639 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1030 First attempt at a working accumulo-maven-plugin

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1502702 13f79535-47bb-0310-9956-ffa450edef68