HBASE-18339 Update to hadoop3-alpha4
HBASE-18339 Update to hadoop3-alpha4

Signed-off-by: Sean Busbey <busbey@apache.org>

 Conflicts:
	dev-support/hbase-personality.sh

Amending-Author: Sean Busbey <busbey@apache.org>

Dropped changes to hbase-personality, since we always use the one in master.

HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase