HBASE-15300 Upgrade to zookeeper 3.4.8
HBASE-15300 Upgrade to zookeeper 3.4.8

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