HBASE-17936 Refine sum endpoint example in ref guide
HBASE-17936 Refine sum endpoint example in ref guide

Signed-off-by: Michael Stack <b26dc72d261a92c1cfd1e643717e450a84cf2122@apache.org>

bijugs/hbase,apurtell/hbase,apurtell/hbase,ultratendency/hbase,bijugs/hbase,bijugs/hbase,francisliu/hbase,gustavoanatoly/hbase,francisliu/hbase,Eshcar/hbase,francisliu/hbase,Eshcar/hbase,vincentpoon/hbase,vincentpoon/hbase,HubSpot/hbase,JingchengDu/hbase,gustavoanatoly/hbase,bijugs/hbase,francisliu/hbase,francisliu/hbase,apurtell/hbase,Eshcar/hbase,JingchengDu/hbase,Apache9/hbase,ndimiduk/hbase,HubSpot/hbase,gustavoanatoly/hbase,ultratendency/hbase,mahak/hbase,francisliu/hbase,JingchengDu/hbase,Apache9/hbase,JingchengDu/hbase,vincentpoon/hbase,ndimiduk/hbase,mahak/hbase,ultratendency/hbase,HubSpot/hbase,Eshcar/hbase,Eshcar/hbase,bijugs/hbase,ultratendency/hbase,vincentpoon/hbase,JingchengDu/hbase,apurtell/hbase,ChinmaySKulkarni/hbase,vincentpoon/hbase,HubSpot/hbase,ndimiduk/hbase,gustavoanatoly/hbase,Eshcar/hbase,HubSpot/hbase,ChinmaySKulkarni/hbase,gustavoanatoly/hbase,mahak/hbase,francisliu/hbase,mahak/hbase,gustavoanatoly/hbase,JingchengDu/hbase,ultratendency/hbase,Apache9/hbase,vincentpoon/hbase,ChinmaySKulkarni/hbase,HubSpot/hbase,ndimiduk/hbase,JingchengDu/hbase,apurtell/hbase,ChinmaySKulkarni/hbase,JingchengDu/hbase,Apache9/hbase,Eshcar/hbase,vincentpoon/hbase,ndimiduk/hbase,mahak/hbase,ndimiduk/hbase,HubSpot/hbase,HubSpot/hbase,bijugs/hbase,gustavoanatoly/hbase,apurtell/hbase,apurtell/hbase,Apache9/hbase,Apache9/hbase,bijugs/hbase,JingchengDu/hbase,ndimiduk/hbase,ndimiduk/hbase,gustavoanatoly/hbase,mahak/hbase,ultratendency/hbase,bijugs/hbase,ndimiduk/hbase,ultratendency/hbase,ChinmaySKulkarni/hbase,ChinmaySKulkarni/hbase,vincentpoon/hbase,ChinmaySKulkarni/hbase,Eshcar/hbase,ultratendency/hbase,vincentpoon/hbase,ultratendency/hbase,HubSpot/hbase,Apache9/hbase,mahak/hbase,ChinmaySKulkarni/hbase,ndimiduk/hbase,ultratendency/hbase,bijugs/hbase,gustavoanatoly/hbase,francisliu/hbase,ChinmaySKulkarni/hbase,francisliu/hbase,Eshcar/hbase,HubSpot/hbase,ChinmaySKulkarni/hbase,vincentpoon/hbase,JingchengDu/hbase,francisliu/hbase,Apache9/hbase,apurtell/hbase,apurtell/hbase,mahak/hbase,mahak/hbase,apurtell/hbase,gustavoanatoly/hbase,bijugs/hbase,mahak/hbase,Apache9/hbase,Eshcar/hbase,Apache9/hbase