fix re-register can not work when curator session expires.

[chickenlj]

What is the purpose of the change

related #5126

[codecov-io]

Codecov Report

Merging #5135 into 2.7.4-release will decrease coverage by 0.03%.
The diff coverage is 45.45%.

@@                 Coverage Diff                 @@
##             2.7.4-release    #5135      +/-   ##
===================================================
- Coverage            64.08%   64.05%   -0.04%     
  Complexity             452      452              
===================================================
  Files                  769      769              
  Lines                33240    33300      +60     
  Branches              5240     5251      +11     
===================================================
+ Hits                 21302    21329      +27     
- Misses                9508     9537      +29     
- Partials              2430     2434       +4

Impacted Files	Coverage Δ	Complexity Δ
...pache/dubbo/registry/support/FailbackRegistry.java	74.28% <ø> (ø)	0 <0> (ø)	⬇️
...g/apache/dubbo/config/AbstractInterfaceConfig.java	70.58% <0%> (-1.01%)	0 <0> (ø)
...ing/zookeeper/support/AbstractZookeeperClient.java	70.32% <100%> (+0.66%)	0 <0> (ø)	⬇️
...ookeeper/support/AbstractZookeeperTransporter.java	67.5% <100%> (-17.5%)	0 <0> (ø)
...ting/zookeeper/curator/CuratorZookeeperClient.java	64.21% <61.22%> (+0.63%)	0 <0> (ø)	⬇️
...he/dubbo/registry/zookeeper/ZookeeperRegistry.java	58.75% <9.52%> (-8.63%)	0 <0> (ø)
.../apache/dubbo/remoting/transport/AbstractPeer.java	58.69% <0%> (-6.53%)	0% <0%> (ø)
...he/dubbo/remoting/transport/netty/NettyServer.java	69.64% <0%> (-3.58%)	8% <0%> (-1%)
... and 15 more

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