[YUNIKORN-2948] [shim] Write MockScheduler test which verifies foreign pod tracking

[pbacsko]

What is this PR for?

Test case with MockScheduler to verify foreign pod handling.

What type of PR is it?

• - Bug Fix
• - Improvement
• - Feature
• - Documentation
• - Hot Fix
• - Refactoring

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/YUNIKORN-2948

How should this be tested?

Screenshots (if appropriate)

Questions:

• - The licenses files need update.
• - There is breaking changes for older versions.
• - It needs documentation.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.02%. Comparing base (be76576) to head (9e0049d).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #933   +/-   ##
=======================================
  Coverage   68.02%   68.02%           
=======================================
  Files          70       70           
  Lines        9195     9195           
=======================================
  Hits         6255     6255           
  Misses       2732     2732           
  Partials      208      208           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.