Add implementation of new `Service` Fields in checker.go

Add Variable Value changes of `SuccessNOtified`, `UpdateNotify` and
`DownText` to checker.go.
So the Values can be used in other packages.

core/checker.go

@@ -263,6 +263,7 @@ func recordSuccess(s *Service) {
 	s.CreateHit(hit)
 	s.Online = true
 	notifier.OnSuccess(s.Service)
+	s.SuccessNotified = true
 }
 
 // recordFailure will create a new 'Failure' record in the database for a offline service
@@ -277,5 +278,8 @@ func recordFailure(s *Service, issue string) {
 	utils.Log(2, fmt.Sprintf("Service %v Failing: %v | Lookup in: %0.2f ms", s.Name, issue, fail.PingTime*1000))
 	s.CreateFailure(fail)
 	s.Online = false
+	s.SuccessNotified = false
+	s.UpdateNotify = CoreApp.UpdateNotify.Bool
+	s.DownText = s.DowntimeText()
 	notifier.OnFailure(s.Service, fail.Failure)
 }