System test for post-processing agent memory monitoring

[backmari]

Description of the changes

• advance the post-processing agent version
• add new system test for post-processing agent memory monitoring
• move some test helper functions to new module db_utils

Check all that apply:

• updated documentation
• Source added/refactored
• Added unit tests
• Added integration tests
• (If applicable) Verified that manual tests requiring the /SNS and /HFIR filesystems pass without fail

References:

• Links to IBM EWM items:
• Links to related issues or pull requests:

Manual test for the reviewer

(Instructions for testing here)

Check list for the reviewer

• best software practices
  • clearly named variables (better to be verbose in variable names)
  • code comments explaining the intent of code blocks
• All the tests are passing
• The documentation is up to date
• code comments added when explaining intent

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.10%. Comparing base (e98f787) to head (0a99c11).
Report is 1 commits behind head on next.

Additional details and impacted files

@@           Coverage Diff           @@
##             next     #178   +/-   ##
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  Coverage   77.10%   77.10%           
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  Files          50       50           
  Lines        4626     4626           
=======================================
  Hits         3567     3567           
  Misses       1059     1059           

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[peterfpeterson]

For some reason, collecting the database utilities into tests.utils.db_utils is bothering me way more than it should. Can you change it to either be (preferred) tests.utils.db or tests.db_utils? I like that they are collected into a library to make it easier to see the tests apart from getting things in place for them.

[peterfpeterson]

Looks good to me