[Enhance] Reset resource limit

[AronLin]

Reset resource limit to avoid being killed.

[codecov]

Codecov Report

Merging #5697 (0362ea8) into master (ba28669) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5697      +/-   ##
==========================================
+ Coverage   66.36%   66.37%   +0.01%     
==========================================
  Files         279      279              
  Lines       21962    21963       +1     
  Branches     3650     3650              
==========================================
+ Hits        14576    14579       +3     
+ Misses       6635     6634       -1     
+ Partials      751      750       -1     

Flag	Coverage Δ
unittests	66.35% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
mmdet/datasets/builder.py	65.75% <100.00%> (+0.47%)	⬆️
mmdet/models/utils/normed_predictor.py	88.09% <0.00%> (+4.76%)	⬆️

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