[#9633] Replace List with Map

[emeroad]

No description provided.

[codecov]

Codecov Report

Merging #9634 (16c1eb0) into master (dad8e43) will decrease coverage by 0.00%.
The diff coverage is 83.33%.

@@             Coverage Diff              @@
##             master    #9634      +/-   ##
============================================
- Coverage     38.91%   38.91%   -0.01%     
+ Complexity    11907    11898       -9     
============================================
  Files          3488     3487       -1     
  Lines         93749    93715      -34     
  Branches      10542    10538       -4     
============================================
- Hits          36485    36470      -15     
+ Misses        54091    54080      -11     
+ Partials       3173     3165       -8     

Impacted Files	Coverage Δ
.../profiler/context/scope/DefaultTraceScopePool.java	75.00% <83.33%> (+29.54%)	⬆️
...rc/main/java/com/navercorp/pinpoint/test/Item.java	72.22% <0.00%> (-3.71%)	⬇️
...n/server/bo/serializer/trace/v2/SpanDecoderV0.java	81.73% <0.00%> (+0.45%)	⬆️
...n/server/bo/serializer/trace/v2/SpanEncoderV0.java	83.42% <0.00%> (+0.53%)	⬆️
...ollector/cluster/zookeeper/ZookeeperJobWorker.java	78.07% <0.00%> (+2.13%)	⬆️
...rp/pinpoint/rpc/server/PinpointServerAcceptor.java	88.74% <0.00%> (+4.63%)	⬆️
...vercorp/pinpoint/rpc/packet/ServerClosePacket.java	65.21% <0.00%> (+17.39%)	⬆️

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