Is your feature request related to a problem? Please describe.
Need open source functional tests for certifiability

Describe the solution you'd like
Add cFE Application Behavior API functional tests
– CFE_ES_RunLoop - Check for Exit, Restart, or Reload commands.
– CFE_ES_WaitForStartupSync - Allow an Application to Wait for the "OPERATIONAL" global system state.
– CFE_ES_WaitForSystemState - Allow an Application to Wait for a minimum global system state.
– CFE_ES_IncrementTaskCounter - Increments the execution counter for the calling task.
– CFE_ES_ExitApp - Exit a cFE Application.

Describe alternatives you've considered
N/A

Additional context
N/A

Requester Info
Jacob Hageman - NASA/GSFC

EDIT by @skliper: removed CFE_ES_RegisterApp since it no longer exists.