[ISSUE #7570] fix: add default value for lastPopTimestamp

[HScarb]

Which Issue(s) This PR Fixes

Fixes #7570

Brief Description

Add default value as current time for lastPopTimestamp.

How Did You Test This Change?

Run PopConsumer, there are no errors in the client log.

2023-11-17 10:26:42.442 INFO  [66096] [NettyClientPublicExecutor_5] [o.a.r.c.i.ClientRemotingProcessor#?:?] - receive broker's notification[x.x.x.x:10931], the consumer group: CID_JODIE_1 changed, rebalance immediately
2023-11-17 10:26:42.475 INFO  [66096] [main] [RocketmqRemoting#?:?] - createChannel: connect remote host[x.x.x.x:10911] success, AbstractBootstrap$PendingRegistrationPromise@bf1ec20(success)
2023-11-17 10:26:42.475 INFO  [66096] [NettyClientWorkerThread_3] [RocketmqRemoting#?:?] - NETTY CLIENT PIPELINE: ACTIVE, x.x.x.x:10911
2023-11-17 10:26:42.475 WARN  [66096] [NettyEventExecutor] [o.a.r.c.i.f.MQClientInstance#?:?] - sendHeartbeatToAllBrokerWithLockV2 lock heartBeat, but failed.
2023-11-17 10:26:42.509 INFO  [66096] [NettyClientPublicExecutor_8] [o.a.r.c.i.ClientRemotingProcessor#?:?] - receive broker's notification[x.x.x.x:10911], the consumer group: CID_JODIE_1 changed, rebalance immediately
2023-11-17 10:26:42.509 INFO  [66096] [main] [o.a.r.c.i.f.MQClientInstance#?:?] - send heart beat to broker[broker-a 0 x.x.x.x:10911] success
2023-11-17 10:26:42.509 INFO  [66096] [main] [o.a.r.c.i.f.MQClientInstance#?:?] - HeartbeatData [clientID=10.173.92.229@66096#2054507404466400, producerDataSet=[ProducerData [groupName=CLIENT_INNER_PRODUCER]], consumerDataSet=[ConsumerData [groupName=CID_JODIE_1, consumeType=CONSUME_PASSIVELY, messageModel=CLUSTERING, consumeFromWhere=CONSUME_FROM_FIRST_OFFSET, unitMode=false, subscriptionDataSet=[SubscriptionData [classFilterMode=false, topic=TopicTest, subString=*, tagsSet=[], codeSet=[], subVersion=1700188001236, expressionType=TAG], SubscriptionData [classFilterMode=false, topic=%RETRY%CID_JODIE_1, subString=*, tagsSet=[], codeSet=[], subVersion=1700188001243, expressionType=TAG]]]]]
2023-11-17 10:26:42.521 INFO  [66096] [RebalanceService] [o.a.r.c.c.s.RemoteBrokerOffsetStore#?:?] - remove unnecessary messageQueue offset. group=CID_JODIE_1, mq=MessageQueue [topic=%RETRY%CID_JODIE_1, brokerName=broker-b, queueId=0], offsetTableSize=0
2023-11-17 10:26:42.562 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - doRebalance, CID_JODIE_1, add a new mq, MessageQueue [topic=%RETRY%CID_JODIE_1, brokerName=broker-b, queueId=0]
2023-11-17 10:26:42.563 INFO  [66096] [RebalanceService] [o.a.r.c.c.s.RemoteBrokerOffsetStore#?:?] - remove unnecessary messageQueue offset. group=CID_JODIE_1, mq=MessageQueue [topic=%RETRY%CID_JODIE_1, brokerName=broker-a, queueId=0], offsetTableSize=1
2023-11-17 10:26:42.598 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - doRebalance, CID_JODIE_1, add a new mq, MessageQueue [topic=%RETRY%CID_JODIE_1, brokerName=broker-a, queueId=0]
2023-11-17 10:26:42.599 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - broker rebalanced result changed. allocateMessageQueueStrategyName=AVG, group=CID_JODIE_1, topic=%RETRY%CID_JODIE_1, clientId=10.173.92.229@66096#2054507404466400, assignmentSet=[MessageQueueAssignment [MessageQueue=MessageQueue [topic=%RETRY%CID_JODIE_1, brokerName=broker-a, queueId=0], Mode=PULL], MessageQueueAssignment [MessageQueue=MessageQueue [topic=%RETRY%CID_JODIE_1, brokerName=broker-b, queueId=0], Mode=PULL]]
2023-11-17 10:26:42.599 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - %RETRY%CID_JODIE_1 Rebalance changed, also update version: 1700188001243, 1700188002599
2023-11-17 10:26:42.741 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - doRebalance, CID_JODIE_1, add a new pop mq, MessageQueue [topic=TopicTest, brokerName=broker-a, queueId=-1]
2023-11-17 10:26:42.742 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - doRebalance, CID_JODIE_1, add a new pop mq, MessageQueue [topic=TopicTest, brokerName=broker-b, queueId=-1]
2023-11-17 10:26:42.742 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - broker rebalanced result changed. allocateMessageQueueStrategyName=AVG, group=CID_JODIE_1, topic=TopicTest, clientId=10.173.92.229@66096#2054507404466400, assignmentSet=[MessageQueueAssignment [MessageQueue=MessageQueue [topic=TopicTest, brokerName=broker-a, queueId=-1], Mode=POP], MessageQueueAssignment [MessageQueue=MessageQueue [topic=TopicTest, brokerName=broker-b, queueId=-1], Mode=POP]]
2023-11-17 10:26:42.742 INFO  [66096] [RebalanceService] [o.a.r.c.i.c.RebalanceImpl#?:?] - TopicTest Rebalance changed, also update version: 1700188001236, 1700188002742

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (651a5ca) 43.15% compared to head (71debe6) 43.09%.

Files	Patch %	Lines
...rocketmq/client/impl/consumer/PopProcessQueue.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #7571      +/-   ##
=============================================
- Coverage      43.15%   43.09%   -0.06%     
+ Complexity      9712     9705       -7     
=============================================
  Files           1159     1159              
  Lines          84040    84041       +1     
  Branches       10923    10923              
=============================================
- Hits           36266    36219      -47     
- Misses         43262    43302      +40     
- Partials        4512     4520       +8     

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