Checkmk Werk 15540: Fix discovery for distributed setups with a remote 2.1.0p27 site

ID: 15540 Title: Fix discovery for distributed setups with a remote 2.1.0p27 site Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0p28 This fixes a regression in Checkmk 2.1.0p27. Affected are all distributed setups with remote sites running Checkmk version 2.1.0p27 and a central site older than that. In these setups the service discovery page was broken for all hosts on those remote sites. The displayed error message was "<i>() takes 8 positional arguments but 9 where given</i>". The bulk discovery is not affected. Affected users can either upgrade their entire distributed environment to 2.1.0p27, or upgrade the remote sites from p27 to p28.