Checkmk Werk 15607: Reduce occurences of Missing data

ID: 15607 Title: Reduce occurences of Missing data Component: Setup Level: 2 Class: Bug fix Version: 2.3.0b1 The Check_MK service often showed the message C+: [piggyback] Missing data WARN C-: before a piggyback host was deleted. This lead to many false alarms in dynamic environments such as Kubernetes. The root cause of this was that the <tt>delete-hosts</tt> automation would delete piggyback files, which where still in use. With this Werk, the piggyback files are cleaned up by Check_MK's dedicated housekeeping job (see Werk 5538).