reactor(liteFullNodeTool): refactor code

[halibobo1205]

What does this PR do?

1. optimize exception handling
2. extract common method

Why are these changes required?

This PR has been tested by:

• Unit Tests
• Manual Testing

Follow up

Extra details

[codecov-commenter]

Codecov Report

Merging #4639 (2d563eb) into release_v4.6.0 (046eab5) will increase coverage by 0.05%.
The diff coverage is 53.84%.

@@                 Coverage Diff                  @@
##             release_v4.6.0    #4639      +/-   ##
====================================================
+ Coverage             54.19%   54.25%   +0.05%     
- Complexity             7944     7956      +12     
====================================================
  Files                   831      831              
  Lines                 47123    47115       -8     
  Branches               5106     5103       -3     
====================================================
+ Hits                  25537    25560      +23     
+ Misses                19555    19528      -27     
+ Partials               2031     2027       -4     

Impacted Files	Coverage Δ
...a/org/tron/tool/litefullnode/LiteFullNodeTool.java	75.25% <53.84%> (+0.34%)	⬆️
...g/tron/common/overlay/discover/DiscoverServer.java	79.03% <0.00%> (-1.62%)	⬇️
...mework/src/main/java/org/tron/core/db/Manager.java	55.99% <0.00%> (+0.62%)	⬆️
...rc/main/java/org/tron/consensus/dpos/DposTask.java	91.93% <0.00%> (+3.22%)	⬆️
...ain/java/org/tron/consensus/dpos/StateManager.java	56.25% <0.00%> (+4.16%)	⬆️
...ain/java/org/tron/common/utils/ForkController.java	79.80% <0.00%> (+5.76%)	⬆️
...ron/tool/litefullnode/iterator/RockDBIterator.java	100.00% <0.00%> (+14.28%)	⬆️
...on/tool/litefullnode/iterator/LevelDBIterator.java	100.00% <0.00%> (+14.28%)	⬆️
.../java/org/tron/core/consensus/BlockHandleImpl.java	80.00% <0.00%> (+15.00%)	⬆️
...g/tron/core/exception/DupTransactionException.java	66.66% <0.00%> (+66.66%)	⬆️

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