ignore err if netns is not exist

[l1b0k]

No description provided.

[codecov-commenter]

Codecov Report

Merging #269 (b0be0cb) into main (ad6dffd) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff            @@
##            main    #269      +/-   ##
========================================
- Coverage   4.83%   4.83%   -0.01%     
========================================
  Files         94      94              
  Lines       9259    9263       +4     
========================================
  Hits         448     448              
- Misses      8778    8782       +4     
  Partials      33      33              

Flag	Coverage Δ
unittests	4.83% <0.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
plugin/driver/ipvlan.go	0.00% <0.00%> (ø)
plugin/driver/veth.go	0.00% <0.00%> (ø)

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