Fix #966, update padding in CDS registry record

As the name field is a multiple of 4 bytes, there needs to be 3 bytes
of padding, not 1, to avoid implicit padding.

This doesn't change anything, it just makes the padding explicit instead
of implicit.

fsw/cfe-core/src/es/cfe_es_task.c

@@ -1830,7 +1830,6 @@ int32 CFE_ES_DumpCDSRegistryCmd(const CFE_ES_DumpCDSRegistry_t *data)
                     DumpRecord.Size             = CFE_ES_CDSBlockRecordGetUserSize(RegRecPtr);
                     DumpRecord.Handle           = CFE_ES_CDSBlockRecordGetID(RegRecPtr);
                     DumpRecord.Table            = RegRecPtr->Table;
-                    DumpRecord.ByteAlignSpare1  = 0;
 
                     /* strncpy will zero out any unused buffer - memset not necessary */
                     strncpy(DumpRecord.Name, RegRecPtr->Name, sizeof(DumpRecord.Name)-1);

fsw/cfe-core/src/inc/cfe_es_msg.h

@@ -1478,7 +1478,7 @@ typedef struct CFE_ES_CDSRegDumpRec
     CFE_ES_CDS_Offset_t   Size;            /**< \brief Size, in bytes, of the CDS memory block */
     bool                  Table;           /**< \brief Flag that indicates whether CDS contains a Critical Table */
     char                  Name[CFE_MISSION_ES_CDS_MAX_NAME_LEN]; /**< \brief Processor Unique Name of CDS */
-    uint8                 ByteAlignSpare1; /**< \brief Spare byte to insure structure size is multiple of 4 bytes */
+    uint8                 ByteAlignSpare[3]; /**< \brief Spare bytes to ensure structure size is multiple of 4 bytes */
 } CFE_ES_CDSRegDumpRec_t;
 
 /**