fix creating services that don't use support hours

[cluarkhpe]

It appears that when creating a service with scheduled_actions: null, the API requires that support_hours is also set to null.
Without this change the API returns an error: HTTP response code: 400. Error: &{2001 Invalid Input Provided [Support hours is required.]}

[stmcallister]

Hello! Can you share more context of the scenario you're describing? I'm unable to reproduce the behavior on the API. When I remove scheduled_actions by setting it to null as you described I'm still able to create a service with support_hours set.

[GiedriusS]

Heh, created a PR for the same issue: #258. @stmcallister I think you got this wrong - we are talking about support_hours here. We don't want to set any value for it or IOW we want to use whatever the defaults are. Having omitempty means that if the PTR is nil then it does not end up in the JSON that we send over the wire. And the API rejects requests where this key does not exist - it must be either set to null explicitly or set to the actual value. PTAL again when you'll have some time.

[stmcallister]

@GiedriusS Oh! I see what you're saying. I'll take another look.

[stmcallister]

@cluarkhpe There's been a change made to service.go since you created this PR, causing a conflict. Will you resolve the conflict. Once it's resolved I'll merge your change.

[cluarkhpe]

@stmcallister should be good now

[stmcallister]

Awesome! Thank you for doing this 🎉 👍