Clean up strncpy use

[skliper]

Is your feature request related to a problem? Please describe.
Still occasionally using hardcoded defines for the character array length. Better to use sizeof to simplify maintenance. Also not always setting last character null.

Example:

cFE/fsw/cfe-core/src/es/cfe_es_api.c

Line 1710 in 1ede295

char CDSName[CFE_MISSION_ES_CDS_MAX_FULL_NAME_LEN] = {""};

...

cFE/fsw/cfe-core/src/es/cfe_es_api.c

Lines 1740 to 1741 in 1ede295

	strncpy(CDSName, Name, CFE_MISSION_ES_CDS_MAX_NAME_LENGTH);
	CDSName[CFE_MISSION_ES_CDS_MAX_NAME_LENGTH-1] = '\0';

Describe the solution you'd like
Use sizeof.

Describe alternatives you've considered
None

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC