feat(dubbo/invoker): 修改dubbo 关闭的方式

[xujianhai666]

What this PR does:
advance the destroy impl of dubboInvoker

Special notes for your reviewer:

Does this PR introduce a user-facing change?:
NONE

[codecov-io]

Codecov Report

Merging #268 into develop will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop     #268      +/-   ##
===========================================
+ Coverage    66.38%   66.38%   +<.01%     
===========================================
  Files          111      111              
  Lines         7038     7033       -5     
===========================================
- Hits          4672     4669       -3     
  Misses        1907     1907              
+ Partials       459      457       -2

Impacted Files	Coverage Δ
protocol/dubbo/dubbo_invoker.go	92.3% <100%> (+8.21%)	⬆️
config_center/apollo/impl.go	84.41% <0%> (-2.6%)	⬇️

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[AlexStocks]

LGTM