【bugfix】修复上下文类加载器切换恢复异常问题(1.0.x)

[lilai23]

【修复issue】#1156

【修改内容】修复上下文类加载器切换恢复异常问题

【用例描述】无需修改

【自测情况】类加载问题复现并解决

【影响范围】springboot注册插件

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b72330b) 45.59% compared to head (19874af) 45.59%.

Additional details and impacted files

@@            Coverage Diff            @@
##              1.0.x    #1160   +/-   ##
=========================================
  Coverage     45.59%   45.59%           
  Complexity     2925     2925           
=========================================
  Files           676      676           
  Lines         14939    14939           
  Branches       1680     1680           
=========================================
  Hits           6811     6811           
  Misses         7272     7272           
  Partials        856      856           

Flag	Coverage Δ
unittests	45.59% <ø> (ø)

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[robotLJW]

/lgtm