System Log/Event string table model unification in FSW and UT update

[CDKnightNASA]

Is your feature request related to a problem? Please describe.
For CFE code that generates syslog messages, the coverage testing checks that a particular message was sent to syslog. The UT code uses a string table, but the CFE code has it hard-coded in the code.

Describe the solution you'd like
Unify the string table model in CFE so that all CFE code that uses strings for events, syslog, etc. store those strings in said table. This would simplify UT checks and would also allow for localization of the CFE codebase.

Describe alternatives you've considered
Removing the UT string table would also make things simpler.

Requester Info
Christopher.D.Knight@nasa.gov