HBASE-8733 Update our hadoop2 in trunk and 0.95 to 2.0.5-alpha (We are currently 2.0.2)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1495852 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/0.95' into 0.95-gd
Merge remote branch 'origin/0.95-gd' into fb-YAHOO-325-0.95-gd