Checkmk Werk 14969: In case of error show most recent message in service summary

ID: 14969 Title: In case of error show most recent message in service summary Component: Checks & agents Level: 1 Class: New feature Version: 2.2.0i1 This werk only affects maintainers of custom special agents: Previously, when an error occurred when executing a special agent, the first exception line was displayed in the service summary of the <i>Check_MK</i> service. Since the last line is usually the most recent message, e.g. when displaying traceback, this werk changes the summary to be the last line.