[fix] trace leak when load testing #448

[eeliu]

end trace should it's node tree, not just itself

[codecov]

Codecov Report

Merging #455 (ade44d0) into master (1b6f262) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #455   +/-   ##
=======================================
  Coverage   76.24%   76.24%           
=======================================
  Files          20       20           
  Lines        1082     1082           
=======================================
  Hits          825      825           
  Misses        257      257           

Impacted Files	Coverage Δ
common/src/common.cpp	68.13% <100.00%> (ø)

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