[DS-6502][MasterServer] fix cmdParam NPE when constructProcessInstance on SCHEDULER mode

[caishunfeng]

this pr close #6502

Purpose of the pull request

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This pull request is code cleanup without any test coverage.

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This pull request is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

[codecov-commenter]

Codecov Report

Merging #6504 (25a055e) into dev (db04a5b) will increase coverage by 0.06%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##                dev    #6504      +/-   ##
============================================
+ Coverage     38.58%   38.65%   +0.06%     
- Complexity     3205     3210       +5     
============================================
  Files           645      645              
  Lines         25756    25756              
  Branches       2791     2791              
============================================
+ Hits           9938     9955      +17     
+ Misses        14907    14889      -18     
- Partials        911      912       +1     

Impacted Files	Coverage Δ
...lphinscheduler/service/process/ProcessService.java	37.22% <0.00%> (ø)
...rver/master/processor/queue/TaskResponseEvent.java	100.00% <0.00%> (+6.45%)	⬆️
...er/master/processor/queue/TaskResponseService.java	55.29% <0.00%> (+15.29%)	⬆️

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

60.0% Coverage
0.0% Duplication

[lenboo]

+1