No option to delete a downtime

[stefansloboda]

zmon-cli/zmon_cli/cmds/downtime.py

Line 30 in 375550a

end_ts = time.time() + (duration * 60)

By default, zmon down create -o yaml "entitidy-id" creates a downtime for 60!! minutes and it is not possible to delete a downtime.

[beverage]

This is supported by the controller API - should be a small change to the cli to expose it: https://github.com/zalando-zmon/zmon-controller/blob/master/zmon-controller-app/src/main/java/org/zalando/zmon/api/DowntimesApi.java#L64