Checkmk Werk 15033: check_mk_agent.linux: increase refresh interval for chrony section

ID: 15033 Title: check_mk_agent.linux: increase refresh interval for chrony section Component: agents Level: 1 Class: Bug fix Version: 2.2.0i1 Prior to this werk, the chrony cached section had the same value for both age validity and the refresh interval. This led to an occasional CRIT status on the associating service as this was influenced by the timing of the refresh mechanism, the cache file writeout duration as well as the section processing duration on Checkmk's side. This werk, therefore, increases the age validity of the cached section.