fix checkstyle of core-task issue

[seagle-yuan]

fix checkstyel issue

com.baidu.hugegraph.HugeFactory.java
com.baidu.hugegraph.HugeGraph.java
com.baidu.hugegraph.HugeGraphParams.java
com.baidu.hugegraph.StandardHugeGraph.java
com.baidu.hugegraph.io.HugeGraphSONModule.java
com.baidu.hugegraph.job.computer.AbstractComputer.java
com.baidu.hugegraph.job.computer.LouvainComputer.java
com.baidu.hugegraph.job.system.DeleteExpiredIndexJob.java
com.baidu.hugegraph.plugin.HugeGraphGremlinPlugin.java
com.baidu.hugegraph.schema.builder.PropertyKeyBuilder.java
com.baidu.hugegraph.security.HugeSecurityManager.java
com.baidu.hugegraph.task.HugeTask.java
com.baidu.hugegraph.task.TaskManager.java
com.baidu.hugegraph.task.TaskScheduler.java

[codecov]

Codecov Report

Merging #1854 (114cf51) into master (044a15e) will increase coverage by 4.04%.
The diff coverage is 87.50%.

@@             Coverage Diff              @@
##             master    #1854      +/-   ##
============================================
+ Coverage     66.96%   71.01%   +4.04%     
  Complexity      982      982              
============================================
  Files           447      447              
  Lines         38045    38045              
  Branches       5391     5391              
============================================
+ Hits          25476    27016    +1540     
+ Misses        10065     8395    -1670     
- Partials       2504     2634     +130     

Impacted Files	Coverage Δ
...e/src/main/java/com/baidu/hugegraph/HugeGraph.java	65.30% <ø> (ø)
...in/java/com/baidu/hugegraph/StandardHugeGraph.java	66.95% <ø> (+1.40%)	⬆️
...baidu/hugegraph/job/computer/AbstractComputer.java	0.00% <0.00%> (ø)
.../baidu/hugegraph/job/computer/LouvainComputer.java	0.00% <ø> (ø)
...u/hugegraph/schema/builder/PropertyKeyBuilder.java	89.71% <ø> (ø)
.../baidu/hugegraph/security/HugeSecurityManager.java	77.88% <75.00%> (ø)
...src/main/java/com/baidu/hugegraph/HugeFactory.java	79.36% <90.00%> (ø)
...ava/com/baidu/hugegraph/io/HugeGraphSONModule.java	82.88% <100.00%> (ø)
...du/hugegraph/job/system/DeleteExpiredIndexJob.java	85.71% <100.00%> (ø)
...baidu/hugegraph/plugin/HugeGraphGremlinPlugin.java	86.66% <100.00%> (ø)
... and 56 more

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