Typos + rename CMake project from CFE_SAMPLE_LIB to CFS_SAMPLE_LIB

[thnkslprpt]

Checklist

• I reviewed the Contributing Guide.
• I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug
There are a few minor typos + naming updates that have built up my spreadsheet for sample_lib and could do with a quick clean-up.

Reporter Info
Avi Weiss   @thnkslprpt