Checkmk Werk 14771: Fix ping endpoint for InfluxDB

ID: 14771 Title: Fix ping endpoint for InfluxDB Component: Core & setup Level: 1 Class: Bug fix Version: 2.2.0i1 The InfluxDB connector checks whether a connection is possible over the "ping" endpoint. Before, the connector erroneously used the /api/v2/ping endpoint, which has stopped working in recent versions of the API. Now, it correctly uses the documented /ping endpoint.