Fix #179, Light initialization logic refactor + remove multiple returns

[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 Light initialization logic refactor + remove multiple returns #179
  • TO_LAB_init refactored to remove multiple returns, and not continue with subsequent steps after a serious failure of a call to cFE during the initialization

Testing performed
GitHub CI actions all passing successfully (incl. Build + Run, Unit/Functional Tests etc.).
Tested locally with cFS build + test commands - all working fine.

Expected behavior changes

• if CFE_SB_CreatePipe fails when creating the command pipe, to_lab will not go on try to create the telemetry pipe.
• if CFE_SB_CreatePipe fails when creating the telemetry pipe, to_lab will not try to add the subscriptions - which makes little sense anyway...
• also, in neither case will to_lab now report successful initialization if the pipes cannot be created.
• the delete handler will be installed now in all cases even if one of the early calls to cFE fails - this is the case also in other apps.

System(s) tested on
Debian GNU/Linux 11 (bullseye)
Current main branch of cFS bundle.

Contributor Info
Avi Weiss   @thnkslprpt