Fix get_child_process_ids() parsing issue

[pintaoz-aws]

Issue #, if available:

Description of changes:
Fix get_child_process_ids() by not parsing string

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.60%. Comparing base (6101bf2) to head (813f6f7).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5416       +/-   ##
===========================================
+ Coverage   85.28%   96.60%   +11.32%     
===========================================
  Files          79      106       +27     
  Lines       11788    20012     +8224     
===========================================
+ Hits        10053    19333     +9280     
+ Misses       1735      679     -1056     

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