HBASE-20088 Update NOTICE.txt year
HBASE-20088 Update NOTICE.txt year

Signed-off-by: Andrew Purtell <b91237ce35d325aea9eacb2c17af89139c6c9289@apache.org>

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