toString added for tbApplicationEvent and PartitionChangeEvent to provide a better log experience

# Conflicts:
#	common/queue/src/main/java/org/thingsboard/server/queue/discovery/PartitionChangeEvent.java
#	common/queue/src/main/java/org/thingsboard/server/queue/discovery/TbApplicationEvent.java

common/queue/src/main/java/org/thingsboard/server/queue/discovery/event/PartitionChangeEvent.java

@@ -16,13 +16,14 @@
 package org.thingsboard.server.queue.discovery.event;
 
 import lombok.Getter;
+import lombok.ToString;
 import org.thingsboard.server.common.msg.queue.ServiceQueueKey;
 import org.thingsboard.server.common.msg.queue.ServiceType;
 import org.thingsboard.server.common.msg.queue.TopicPartitionInfo;
 
 import java.util.Set;
 
-
+@ToString(callSuper = true)
 public class PartitionChangeEvent extends TbApplicationEvent {
 
     private static final long serialVersionUID = -8731788167026510559L;

common/queue/src/main/java/org/thingsboard/server/queue/discovery/event/TbApplicationEvent.java

@@ -16,10 +16,12 @@
 package org.thingsboard.server.queue.discovery.event;
 
 import lombok.Getter;
+import lombok.ToString;
 import org.springframework.context.ApplicationEvent;
 
 import java.util.concurrent.atomic.AtomicInteger;
 
+@ToString
 public class TbApplicationEvent extends ApplicationEvent {
 
     private static final long serialVersionUID = 3884264064887765146L;