[Improvement][Test] Remove powermock in dolphinscheduler-master module

[EricGao888]

Purpose of the pull request

• This PR closes [Improvement][Test] Remove Powermock in dolphinscheduler-master #12124

Brief change log

This PR did some code cleaning In dolphinscheduler-master module:

• Removed powermock related code.
• Removed redundant comments and useless test code.
• Removed unnecessary stubbings.

Verify this pull request

• Covered and verified by unit tests.

[codecov-commenter]

Codecov Report

Merging #12143 (4fce2a0) into dev (6eb1eb7) will increase coverage by 0.35%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev   #12143      +/-   ##
============================================
+ Coverage     38.69%   39.04%   +0.35%     
- Complexity     4010     4078      +68     
============================================
  Files          1001     1010       +9     
  Lines         37422    37713     +291     
  Branches       4262     4330      +68     
============================================
+ Hits          14480    14726     +246     
- Misses        21295    21299       +4     
- Partials       1647     1688      +41     

Impacted Files	Coverage Δ
...scheduler/api/service/impl/FavTaskServiceImpl.java	5.88% <0.00%> (-3.21%)	⬇️
...apache/dolphinscheduler/common/utils/NetUtils.java	49.28% <0.00%> (-1.07%)	⬇️
...uler/server/master/registry/ServerNodeManager.java	1.05% <0.00%> (-0.13%)	⬇️
.../org/apache/dolphinscheduler/api/enums/Status.java	100.00% <0.00%> (ø)
.../org/apache/dolphinscheduler/api/utils/Result.java	94.11% <0.00%> (ø)
.../org/apache/dolphinscheduler/spi/enums/DbType.java	0.00% <0.00%> (ø)
...eduler/api/dto/schedule/ScheduleCreateRequest.java	85.71% <0.00%> (ø)
...eduler/api/dto/schedule/ScheduleUpdateRequest.java	41.66% <0.00%> (ø)
...eduler/api/dto/workflow/WorkflowCreateRequest.java	100.00% <0.00%> (ø)
...eduler/api/dto/workflow/WorkflowUpdateRequest.java	50.00% <0.00%> (ø)
... and 16 more

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication