Fix #131, Rename CommandCode variable to FcnCode

[thnkslprpt]

Checklist

• 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

• Fixes Recommend using FcnCode (instead of CommandCode) terminology in the code #131
  • Rename the CommandCode variable in TO_LAB_exec_local_command() to FcnCode to better align with the cFE API.

Testing performed
Standard cFS bundle tests all passed.
Build/run cFS and test NOOP and other commands with the GroundSystem tool. All working fine.

Expected behavior changes
No impact on behavior.
Improves code clarity and consistency in the lab apps.

System(s) tested on
Intel(R) Celeron(R) N4100 CPU @ 1.10GHz x86_64
Debian GNU/Linux 11 (bullseye)
cFE v7.0.0-rc4+dev197, OSAL v6.0.0-rc4+dev143, PSP v1.6.0-rc4+d
Sample App v1.3.0-rc4+dev35
CI Lab App v2.5.0-rc4+dev39
TO Lab v2.5.0-rc4+dev31

Contributor Info
Avi Weiss @thnkslprpt

[dzbaker]

@thnkslprpt CCB 20 October 2022: Approved pending resolution of failed workflow (squash commits?)

[thnkslprpt]

Sorry - replaced with #171 (I still can't figure out how to deal with rebases that remove all changes, and then add back the actual changes from PR into 1 commit without closing the issue...)

[skliper]

@thnkslprpt - cherry-pick might be what you are looking for: https://git-scm.com/docs/git-cherry-pick. Allows you to apply just the changes in a specific commit.