Set ErrorLevel to ErrorDebug when deleting a DNS recordset associated with a deleted instance
Overview
Fixes #981 (closed), see that issue for context.
How to Test
- Create an instance (on a cloud that has OpenStack Designate with automatic instance hostname creation enabled).
- Don't rename the instance.
- Delete the instance and wait a moment.
- You should not see a toast error message in the UI.
- You might see a debug-level message on the messages page indicating a failure to "Delete DNS record".