HBASE-18284 Update hbasecon asia logo on home page of hbase.apache.org
HBASE-18284 Update hbasecon asia logo on home page of hbase.apache.org

Signed-off-by: Chia-Ping Tsai <51ef25fd0a3611d18ffb478ae2ae610bbbd2432c@gmail.com>

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