Multi-Db changes for NAT feature. (sonic-net#818)

Author: AkhileshSamineni

config/nat.py

@@ -283,7 +283,7 @@ def add_basic(ctx, global_ip, local_ip, nat_type, twice_nat_id):
         ctx.fail("Given entry is overlapping with existing Dynamic entry !!")
 
     if entryFound is False:
-        counters_db = SonicV2Connector(host="127.0.0.1")
+        counters_db = SonicV2Connector()
         counters_db.connect(counters_db.COUNTERS_DB)
         snat_entries = 0
         max_entries = 0
@@ -363,7 +363,7 @@ def add_tcp(ctx, global_ip, global_port, local_ip, local_port, nat_type, twice_n
         ctx.fail("Given entry is overlapping with existing NAT entry !!")
 
     if entryFound is False:
-        counters_db = SonicV2Connector(host="127.0.0.1")
+        counters_db = SonicV2Connector()
         counters_db.connect(counters_db.COUNTERS_DB)
         snat_entries = 0
         max_entries = 0
@@ -443,7 +443,7 @@ def add_udp(ctx, global_ip, global_port, local_ip, local_port, nat_type, twice_n
         ctx.fail("Given entry is overlapping with existing NAT entry !!")
 
     if entryFound is False:
-        counters_db = SonicV2Connector(host="127.0.0.1")
+        counters_db = SonicV2Connector()
         counters_db.connect(counters_db.COUNTERS_DB)
         snat_entries = 0
         max_entries = 0

scripts/natclear

@@ -22,7 +22,7 @@ class NatClear(object):
 
     def __init__(self):
         super(NatClear,self).__init__()
-        self.db = SonicV2Connector(host="127.0.0.1")
+        self.db = SonicV2Connector()
         self.db.connect(self.db.APPL_DB)
         return
 

scripts/natshow

@@ -69,9 +69,9 @@ class NatShow(object):
 
     def __init__(self):
         super(NatShow,self).__init__()
-        self.asic_db = SonicV2Connector(host="127.0.0.1")
-        self.appl_db = SonicV2Connector(host="127.0.0.1")
-        self.counters_db = SonicV2Connector(host="127.0.0.1")
+        self.asic_db = SonicV2Connector()
+        self.appl_db = SonicV2Connector()
+        self.counters_db = SonicV2Connector()
         return
 
     def fetch_count(self):