ACCUMULO-1792 Update commons-io dependency for Hadoop2.
ACCUMULO-1792 Update commons-io dependency for Hadoop2.

Based on the discussion around ACCUMULO-1244, we can update to 2.1 while not marking commons-io as provided to eliminated classpath issues on hadoop 2 and bring a copy in lib/ for hadoop 0.20.

Signed-off-by: Eric Newton <bfa3dc402874a58aa6ae3fd8fc03865f1c59e2da@gmail.com>

lstav/accumulo,keith-turner/accumulo,dhutchis/accumulo,mikewalch/accumulo,dhutchis/accumulo,adamjshook/accumulo,milleruntime/accumulo,ivakegg/accumulo,lstav/accumulo,ivakegg/accumulo,joshelser/accumulo,apache/accumulo,adamjshook/accumulo,joshelser/accumulo,ctubbsii/accumulo,ctubbsii/accumulo,mjwall/accumulo,milleruntime/accumulo,joshelser/accumulo,lstav/accumulo,adamjshook/accumulo,adamjshook/accumulo,apache/accumulo,keith-turner/accumulo,dhutchis/accumulo,apache/accumulo,keith-turner/accumulo,keith-turner/accumulo,phrocker/accumulo,keith-turner/accumulo,dhutchis/accumulo,adamjshook/accumulo,ctubbsii/accumulo,phrocker/accumulo,apache/accumulo,dhutchis/accumulo,apache/accumulo,phrocker/accumulo,lstav/accumulo,mikewalch/accumulo,phrocker/accumulo,ctubbsii/accumulo,joshelser/accumulo,milleruntime/accumulo,phrocker/accumulo,keith-turner/accumulo,keith-turner/accumulo,joshelser/accumulo,mikewalch/accumulo,lstav/accumulo,milleruntime/accumulo,milleruntime/accumulo,phrocker/accumulo,mjwall/accumulo,mikewalch/accumulo,phrocker/accumulo-1,adamjshook/accumulo,mjwall/accumulo,phrocker/accumulo-1,ivakegg/accumulo,phrocker/accumulo-1,mikewalch/accumulo,adamjshook/accumulo,milleruntime/accumulo,apache/accumulo,mjwall/accumulo,ivakegg/accumulo,lstav/accumulo,dhutchis/accumulo,phrocker/accumulo-1,phrocker/accumulo-1,ivakegg/accumulo,dhutchis/accumulo,phrocker/accumulo,adamjshook/accumulo,mikewalch/accumulo,adamjshook/accumulo,phrocker/accumulo-1,joshelser/accumulo,mikewalch/accumulo,dhutchis/accumulo,joshelser/accumulo,ctubbsii/accumulo,milleruntime/accumulo,ivakegg/accumulo,mjwall/accumulo,mikewalch/accumulo,ivakegg/accumulo,apache/accumulo,mjwall/accumulo,phrocker/accumulo-1,ctubbsii/accumulo,joshelser/accumulo,ctubbsii/accumulo,lstav/accumulo,phrocker/accumulo,dhutchis/accumulo,mjwall/accumulo,phrocker/accumulo