fix(core): handle schema Cache expandCapacity concurrent problem

[conghuhu]

Purpose of the PR

fix #2330

Main Changes

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  • org.apache.hugegraph.unit.store.RamIntObjectMapTest

before：

after:

Does this PR potentially affect the following parts?

• Nope
• Dependencies (add/update license info)
• Modify configurations
• The public API
• Other affects (typed here)

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[conghuhu]

@imbajin PTAL

[codecov]

Codecov Report

Merging #2332 (a28e6dd) into master (869fc81) will increase coverage by 1.07%.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #2332      +/-   ##
============================================
+ Coverage     63.85%   64.93%   +1.07%     
- Complexity      684      686       +2     
============================================
  Files           505      505              
  Lines         41902    41903       +1     
  Branches       5817     5817              
============================================
+ Hits          26756    27209     +453     
+ Misses        12455    11997     -458     
- Partials       2691     2697       +6     

Files	Coverage Δ
...ache/hugegraph/backend/store/ram/IntObjectMap.java	73.07% <100.00%> (+1.07%)	⬆️

... and 28 files with indirect coverage changes

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[javeme]

LGTM

[imbajin]

LGTM

[imbajin]

Find another critical bug @conghuhu

maybe we don't handle all of the concurrent issues 😢