TBL uncovered lines in CFE_TBL_LoadCmd, no alternative error codes from CFE_TBL_GetWorkingBuffer

[skliper]

Is your feature request related to a problem? Please describe.
CFE_TBL_GetWorkingBuffer has no alternative error codes to exercise the following code in CFE_TBL_LoadCmd:

     492         [ +  - ]:          2 :                         else if (Status == CFE_TBL_ERR_NO_BUFFER_AVAIL)
     493                 :            :                         {
     494                 :          2 :                             CFE_EVS_SendEvent(CFE_TBL_NO_WORK_BUFFERS_ERR_EID, CFE_EVS_EventType_ERROR,
     495                 :            :                                               "No working buffers available for table '%s'", TblFileHeader.TableName);
     496                 :            :                         }
     497                 :            :                         else
     498                 :            :                         {
     499                 :          0 :                             CFE_EVS_SendEvent(CFE_TBL_INTERNAL_ERROR_ERR_EID, CFE_EVS_EventType_ERROR,
     500                 :            :                                               "Internal Error (Status=0x%08X)", (unsigned int)Status);
     501                 :            :                         }

cFE/modules/tbl/fsw/src/cfe_tbl_task_cmds.c

Lines 492 to 501 in 5e41330

	else if (Status == CFE_TBL_ERR_NO_BUFFER_AVAIL)
	{
	CFE_EVS_SendEvent(CFE_TBL_NO_WORK_BUFFERS_ERR_EID, CFE_EVS_EventType_ERROR,
	"No working buffers available for table '%s'", TblFileHeader.TableName);
	}
	else
	{
	CFE_EVS_SendEvent(CFE_TBL_INTERNAL_ERROR_ERR_EID, CFE_EVS_EventType_ERROR,
	"Internal Error (Status=0x%08X)", (unsigned int)Status);
	}

Describe the solution you'd like
Could cover if CFE_TBL_GetWorkingBuffer was stubbed (test individual file units in #1886). Note there is a possible internal error from getting the mutex, but it doesn't get returned (see #1469)

Describe alternatives you've considered
Trade refactor/removal of condition... it's useful if errors do get added, just not currently reachable.

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC