[pbh]: Add PBH DB schema. (#495)

*Added PBH Config DB schema
Signed-off-by: Nazarii Hnydyn <[email protected]>

Author: nazariig

common/schema.h

@@ -235,6 +235,11 @@ namespace swss {
 #define CFG_FLEX_COUNTER_TABLE_NAME "FLEX_COUNTER_TABLE"
 #define CFG_WATERMARK_TABLE_NAME "WATERMARK_TABLE"
 
+#define CFG_PBH_TABLE_TABLE_NAME      "PBH_TABLE"
+#define CFG_PBH_RULE_TABLE_NAME       "PBH_RULE"
+#define CFG_PBH_HASH_TABLE_NAME       "PBH_HASH"
+#define CFG_PBH_HASH_FIELD_TABLE_NAME "PBH_HASH_FIELD"
+
 #define CFG_PFC_PRIORITY_TO_PRIORITY_GROUP_MAP_TABLE_NAME "PFC_PRIORITY_TO_PRIORITY_GROUP_MAP"
 #define CFG_TC_TO_PRIORITY_GROUP_MAP_TABLE_NAME     "TC_TO_PRIORITY_GROUP_MAP"
 #define CFG_PFC_PRIORITY_TO_QUEUE_MAP_TABLE_NAME    "MAP_PFC_PRIORITY_TO_QUEUE"