Update CHANGELOG.md
Update CHANGELOG.md

Reordered bugfix/features in descending order now that 1.2.0 is released.
adityacs/kapacitor,influxdb/kapacitor,influxdb/kapacitor,adityacs/kapacitor,influxdb/kapacitor,adityacs/kapacitor,sputnik13/kapacitor,sputnik13/kapacitor,sputnik13/kapacitor