FM tries to send an event message on failure of registering with EVS

[thnkslprpt]

Checklist

• I reviewed the Contributing Guide.
• I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug
Copy of nasa/DS#85
FM and DS are the only apps to (attempt to) utilize CFE_EVS_SendEvent even though the call to CFE_EVS_Register failed.
Better update to CFE_ES_WriteToSysLog so failure can be recorded somewhere. This brings FM (and DS) in line with the other cFS apps.

Code snips

FM/fsw/src/fm_app.c

Lines 175 to 182 in 2be3511

	/* Register for event services */
	Result = CFE_EVS_Register(NULL, 0, CFE_EVS_EventFilter_BINARY);
	if (Result != CFE_SUCCESS)
	{
	CFE_EVS_SendEvent(FM_STARTUP_EVENTS_ERR_EID, CFE_EVS_EventType_ERROR,
	"%s register for event services: result = 0x%08X", ErrText, (unsigned int)Result);
	}

Expected behavior
CFE_ES_WriteToSysLog on failure.

Reporter Info
Avi Weiss @thnkslprpt