Checkmk Werk 15882: handling of 409 status code during activate changes

ID: 15882 Title: handling of 409 status code during activate changes Component: Dynamic host configuration Level: 1 Class: Bug fix Version: 2.3.0b1 Prior to this werk, whenever the activate changes endpoint returned a 409 response the DCD failed and logged the error without any helpful information on why this error occurred. This werk improves the error and logging handling for this case.