ACCUMULO-3137 update data version to force a check for outstanding FATE
operations, and reorganize the constants that represent upgrade steps.
ACCUMULO-3049 close the connections to the tservers
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/accumulo
ACCUMULO-3049 close the connections to the tservers
Merge branch '1.6.1-SNAPSHOT'