Merge pull request #2766 from metabase/disable-quartz-phone-home

Prevent quartz scheduler from phoning home to terracotta.org

resources/quartz.properties

+org.quartz.scheduler.instanceName = MetabaseScheduler
+org.quartz.threadPool.threadCount = 4
+
+# Don't phone home
+org.quartz.scheduler.skipUpdateCheck: true