Dataplane telemetry support in SONiC (#205)

* Add new table names for DTEL support in SONiC

* Change Dtel event table name

* Change Dtel table names to config db compliant names

* Change Dtel table names to config db compliant names

* Change DTel table names to handle "config save" followed by reboot

* Initial code changes to address review comments

Author: shruthi9

common/schema.h

@@ -158,6 +158,12 @@ namespace swss {
 #define DEL_COMMAND "DEL"
 #define EMPTY_PREFIX ""
 
+#define CFG_DTEL_TABLE_NAME					"DTEL"
+#define CFG_DTEL_REPORT_SESSION_TABLE_NAME	"DTEL_REPORT_SESSION"
+#define CFG_DTEL_INT_SESSION_TABLE_NAME		"DTEL_INT_SESSION"
+#define CFG_DTEL_QUEUE_REPORT_TABLE_NAME	"DTEL_QUEUE_REPORT"
+#define CFG_DTEL_EVENT_TABLE_NAME			"DTEL_EVENT"
+
 }
 
 #endif