updated datastax client
updated datastax client

kairosdb/kairosdb,kairosdb/kairosdb,kairosdb/kairosdb,kairosdb/kairosdb,ppbizapps/kairosdb,kairosdb/kairosdb,ppbizapps/kairosdb,ppbizapps/kairosdb,kairosdb/kairosdb,ppbizapps/kairosdb,ppbizapps/kairosdb