Fix #21, Add idle task while loop back in

[skliper]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

• Fix HS idle task only executes once and exits... reports CPU hogging all the time #21
  Just adds idle task loop back in

Testing performed
CI

Expected behavior changes
Idle task loops and should report hogging correctly (should check with functional test)

System(s) tested on

• Hardware: i5/wsl
• OS: Ubuntu 18.04
• Versions: Bundle main + this commit

Additional context
Still need to finish testing

Third party code
None

Contributor Info - All information REQUIRED for consideration of pull request
Jacob Hageman - NASA/GSFC

[astrogeco]

CCB:2022-05-25 APPROVED

• haven't done extensive testing yet
• coverage went down since we added new functions
• CTF test is hanging on SP0

[skliper]

Confirmed hogging is no longer reported on startup from the CI log: https://github.com/nasa/HS/actions/runs/2385717353. Note the added lines adds to uncovered line count so coverage fails, but this should get fixed with the rest of the coverage updates.