Allow editing of downtimes to API

[tofu-rocketry]

From discussions with @jose-caballero, there's a use case to be able to add downtimes across multiple sites/services at once, such as for CVMFS at RAL when the Tier 1 also needs a downtime. Adding write functionality to the API would at least allow people to script this if they have a virtual or physical grouping they need to cover that isn't part of the strict GOCDB hierarchy.

Service Groups don't allow you to add downtimes from them, only list relevant ones.

[gregcorbett]

#261 is related as it covers adding the ability to add downtimes across multiple sites/services at once via the portal.

[jose-caballero]

Is this something that can be achieved using Service Groups?
Now, my understanding from conversations with @tofu-rocketry is that you can not create groups of groups. Is that correct?

[gregcorbett]

Is this something that can be achieved using Service Groups?

Possibly, I could see functionality whereby you can downtime all/some Services in a ServiceGroup.

Now, my understanding from conversations with @tofu-rocketry is that you can not create groups of groups. Is that correct?

That is correct yes. ServiceGroups currently can only contain Services, not other ServiceGroups.