Apply suggestion from @hsato03

Co-authored-by: Henrique Sato <henriquesato2003@gmail.com>

Author: JoaoJandre

agent/src/main/java/com/cloud/agent/properties/AgentProperties.java

@@ -593,7 +593,7 @@ public class AgentProperties{
     /**
      * This parameter specifies if the host must be rebooted when something goes wrong with the heartbeat.<br>
      * Data type: Boolean.<br>
-     * Default value: <code>true</code>
+     * Default value: <code>false</code>
      */
     public static final Property<Boolean> REBOOT_HOST_AND_ALERT_MANAGEMENT_ON_HEARTBEAT_TIMEOUT
         = new Property<>("reboot.host.and.alert.management.on.heartbeat.timeout", false);