ACCUMULO-462 ACCUMULO-867 made constraints reload and use new context classloader

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1437810 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-695 Support the old mapreduce API. This is a first cut. Some attempt was made to reuse code, but it may benefit from further consolidation. This will
need unit tests at some point.


git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1437818 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-969 cleaned up the thrift spec file, added column filtering to scanners, moved all column options to a new data type, checkpointing

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1437820 13f79535-47bb-0310-9956-ffa450edef68