SUBMARINE-1347. Fix the syntax error reported in sonarcloud.

[hhcs9527]

What is this PR for?

Fix the syntax error reported in sonarcloud.

What type of PR is it?

Bug Fix

Todos

• - Task

What is the Jira issue?

SUBMARINE-1347

How should this be tested?

Screenshots (if appropriate)

Questions:

• Do the license files need updating? No
• Are there breaking changes for older versions? No
• Does this need new documentation? No

[codecov]

Codecov Report

Merging #1018 (900a375) into master (179ce61) will not change coverage.
The diff coverage is 33.33%.

@@            Coverage Diff            @@
##             master    #1018   +/-   ##
=========================================
  Coverage     25.48%   25.48%           
  Complexity     1079     1079           
=========================================
  Files           358      358           
  Lines         29089    29089           
  Branches       3479     3479           
=========================================
  Hits           7412     7412           
+ Misses        21463    21461    -2     
- Partials        214      216    +2     

Flag	Coverage Δ
python-integration	59.59% <ø> (ø)
python-unit	52.19% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../submarine/server/manager/ModelVersionManager.java	45.56% <ø> (ø)
...bmarine/server/manager/RegisteredModelManager.java	61.19% <ø> (ø)
...marine/server/submitter/k8s/model/mljob/MLJob.java	85.58% <0.00%> (ø)
...submitter/k8s/model/xgboostjob/XGBoostJobList.java	0.00% <0.00%> (ø)
...he/submarine/server/websocket/WebSocketServer.java	52.00% <100.00%> (ø)

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[hhcs9527]

@cdmikechen please take a look at the pr, thanks.

[cdmikechen]

@pingsutw @hhcs9527
I think there is still a problem with this change in XGBoostJobList, as there is only a get method, so we need to initialize the relevant variables, otherwise there will be a NPE.