use env var for kapacitor url
use env var for kapacitor url

yosiat/kapacitor,influxdata/kapacitor,adityacs/kapacitor,alerta/kapacitor,influxdb/kapacitor,influxdb/kapacitor,muxinc/kapacitor,titilambert/kapacitor,titilambert/kapacitor,sputnik13/kapacitor,titilambert/kapacitor,sputnik13/kapacitor,muxinc/kapacitor,alerta/kapacitor,sputnik13/kapacitor,alerta/kapacitor,muxinc/kapacitor,adityacs/kapacitor,yosiat/kapacitor,bbczeuz/kapacitor,influxdata/kapacitor,influxdb/kapacitor,influxdata/kapacitor,bbczeuz/kapacitor,yosiat/kapacitor,bbczeuz/kapacitor,adityacs/kapacitor