[chassis][voq] Add fabric monitoring tables definitions. (#808)

Add fabric monitoring table names in a common location, as they are utilized in multiple files associated with the fabric monitoring feature.

Author: jfeng-arista

common/schema.h

@@ -531,6 +531,11 @@ namespace swss {
 #define CFG_DTEL_QUEUE_REPORT_TABLE_NAME	"DTEL_QUEUE_REPORT"
 #define CFG_DTEL_EVENT_TABLE_NAME			"DTEL_EVENT"
 
+#define CFG_FABRIC_MONITOR_DATA_TABLE_NAME	"FABRIC_MONITOR"
+#define CFG_FABRIC_MONITOR_PORT_TABLE_NAME	"FABRIC_PORT"
+#define APP_FABRIC_MONITOR_DATA_TABLE_NAME	"FABRIC_MONITOR_TABLE"
+#define APP_FABRIC_MONITOR_PORT_TABLE_NAME	"FABRIC_PORT_TABLE"
+
 #ifdef __cplusplus
 }
 #endif