Make zookeeper_server_group var available for slaves.
Make zookeeper_server_group var available for slaves.

siliconmeadow/Apollo,Capgemini/Apollo,atsaki/Apollo,enxebre/Apollo,ravbaba/Apollo,enxebre/Apollo,atsaki/Apollo,ravbaba/Apollo,Capgemini/Apollo,mehulsbhatt/Apollo,mehulsbhatt/Apollo,Capgemini/Apollo,siliconmeadow/Apollo,phungmanhcuong/Appolo,phungmanhcuong/Appolo