Add functional tests for cFE ES Generic Counter APIs

[zanzaben]

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

Describe the solution you'd like
Add functional tests for cFE Generic Counter APIs
– CFE_ES_RegisterGenCounter - Register a generic counter.
– CFE_ES_DeleteGenCounter - Delete a generic counter.
– CFE_ES_IncrementGenCounter - Increments the specified generic counter.
– CFE_ES_SetGenCount - Set the specified generic counter.
– CFE_ES_GetGenCount - Get the specified generic counter count.
– CFE_ES_GetGenCounterIDByName - Get the Id associated with a generic counter name.

Describe alternatives you've considered
N/A

Additional context
N/A

Requester Info
Alex Campbell GSFC

[zanzaben]

duplicate of #813