ACCUMULO-382 added Config changing node to Concurrent random walk test

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1442957 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1046 fix the examples

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1442987 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1048 fix typo in message

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1442988 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-636 randomly kill datanodes

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1442989 13f79535-47bb-0310-9956-ffa450edef68