Checkmk Werk 11970: API: addition of list agents endpoint which previously return a 500 error

ID: 11970 Title: API: addition of list agents endpoint which previously return a 500 error Component: Core & setup Level: 1 Class: New feature Version: 2.1.0i1 In the previous version, the REST API returned a 500 error when the collections agent endpoint was called. This werk now implements this endpoint and returns a collection object with the corresponding agent hashes.