Fix #680, Remove table service exclusion logic

[skliper]

Describe the contribution
Fix #680 - This removes the final remnants of the table service exclusion logic and documentation.

Testing performed
Build and run unit tests, passed.

Expected behavior changes
No affect to default behavior. EXCLUDE_CFE_TBL no longer used, if define table services will still be started.

System(s) tested on

• Hardware: cFS Dev Server
• OS: Ubuntu 18.04
• Versions: Bundle main + this commit

Additional context
#972 will transition table service to a module that can be customized or implemented differently if desired.

Third party code
None

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

[astrogeco]

CCB:2021-01-27 APPROVED

[astrogeco]

@skliper, #680 references #660 which we seem to have abandoned. Should we revisit and finish #660 which seems to be mostly complete?

[skliper]

@astrogeco Removing the classic text startup script wasn't accepted as a change for Caelum by stakeholders. Could transition #660 to a module along side the classic method (projects could select either option at least for a while), but not a high priority (not a cert issue).