[HORNETQ-1484] Improve log output to explain why cached commands are …

…repeated.

BZ https://bugzilla.redhat.com/show_bug.cgi?id=1193793

(cherry picked from commit f21c1cc)

hornetq-jms-server/src/main/java/org/hornetq/jms/server/HornetQJMSServerLogger.java

@@ -72,7 +72,9 @@ public interface HornetQJMSServerLogger extends BasicLogger
    void bridgeConnected();
 
    @LogMessage(level = Logger.Level.INFO)
-   @Message(id = 121003, value = "JMS Server Manager Running cached command for {0}" , format = Message.Format.MESSAGE_FORMAT)
+   @Message(id = 121003, value = "JMS Server Manager Running cached command for {0}." +
+         "(In the event of failover after failback has occurred, this message may be output multiple times.)",
+         format = Message.Format.MESSAGE_FORMAT)
    void serverRunningCachedCommand(Runnable run);
 
    @LogMessage(level = Logger.Level.INFO)