Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  HeartbeatDaemon: Use Logger's built-in String formatting

Change-Id: I7053f7df5889e3a9e9b19e6b5042ccee14017b86
diff --git a/src/main/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatDaemon.java b/src/main/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatDaemon.java
index c665c7a..7752993 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatDaemon.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatDaemon.java
@@ -67,7 +67,7 @@
       try {
         dispatcher.get().postEvent(new HeartbeatEvent());
       } catch (OrmException | PermissionBackendException e) {
-        logger.error("Failed to post hearbeat event: " + e.getMessage(), e);
+        logger.error("Failed to post heartbeat event: {}", e.getMessage(), e);
       }
     }
   }