ACCUMULO-989 ensured that per compaction iterators are not used for tablets outside of compaction range

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1438837 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-997 Add tracer and proxy to usage on Main


git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1438845 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-986 Override next(), implement OptionDescriber for the shell, and default `prefix` to this.hashCode if it's not set by the time init() gets called.


git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1438849 13f79535-47bb-0310-9956-ffa450edef68