Update all test cases to use IPv6 mapped IPv4

Author: arjan-bal

balancer/pickfirst/pickfirstleaf/pickfirstleaf_ext_test.go

@@ -864,7 +864,7 @@ func (s) TestPickFirstLeaf_InterleavingIPV4Preffered(t *testing.T) {
 				{Addresses: []resolver.Address{{Addr: "3.3.3.3:3"}}},
 				{Addresses: []resolver.Address{{Addr: "4.4.4.4:4"}}},
 				{Addresses: []resolver.Address{{Addr: "[0001:0001:0001:0001:0001:0001:0001:0001]:8080"}}}, // ipv6 with port
-				{Addresses: []resolver.Address{{Addr: "[0002:0002:0002:0002:0002:0002:0002:0002]:2222"}}},
+				{Addresses: []resolver.Address{{Addr: "[::FFFF:192.168.0.1]:2222"}}},
 				{Addresses: []resolver.Address{{Addr: "[0003:0003:0003:0003:0003:0003:0003:0003]:3333"}}},
 				{Addresses: []resolver.Address{{Addr: "grpc.io:80"}}}, // not an IP.
 			},
@@ -879,7 +879,7 @@ func (s) TestPickFirstLeaf_InterleavingIPV4Preffered(t *testing.T) {
 		{Addr: "[0001:0001:0001:0001:0001:0001:0001:0001]:8080"},
 		{Addr: "grpc.io:80"},
 		{Addr: "2.2.2.2:2"},
-		{Addr: "[0002:0002:0002:0002:0002:0002:0002:0002]:2222"},
+		{Addr: "[::FFFF:192.168.0.1]:2222"},
 		{Addr: "3.3.3.3:3"},
 		{Addr: "[0003:0003:0003:0003:0003:0003:0003:0003]:3333"},
 		{Addr: "4.4.4.4:4"},
@@ -953,7 +953,7 @@ func (s) TestPickFirstLeaf_InterleavingUnknownPreffered(t *testing.T) {
 				{Addresses: []resolver.Address{{Addr: "3.3.3.3:3"}}},
 				{Addresses: []resolver.Address{{Addr: "4.4.4.4:4"}}},
 				{Addresses: []resolver.Address{{Addr: "[0001:0001:0001:0001:0001:0001:0001:0001]:8080"}}},
-				{Addresses: []resolver.Address{{Addr: "[0002:0002:0002:0002:0002:0002:0002:0002]:2222"}}},
+				{Addresses: []resolver.Address{{Addr: "[::FFFF:192.168.0.1]:2222"}}},
 				{Addresses: []resolver.Address{{Addr: "[0003:0003:0003:0003:0003:0003:0003:0003]:3333"}}},
 				{Addresses: []resolver.Address{{Addr: "example.com:80"}}}, // not an IP.
 			},
@@ -969,7 +969,7 @@ func (s) TestPickFirstLeaf_InterleavingUnknownPreffered(t *testing.T) {
 		{Addr: "[0001:0001:0001:0001:0001:0001:0001:0001]:8080"},
 		{Addr: "example.com:80"},
 		{Addr: "2.2.2.2:2"},
-		{Addr: "[0002:0002:0002:0002:0002:0002:0002:0002]:2222"},
+		{Addr: "[::FFFF:192.168.0.1]:2222"},
 		{Addr: "3.3.3.3:3"},
 		{Addr: "[0003:0003:0003:0003:0003:0003:0003:0003]:3333"},
 		{Addr: "4.4.4.4:4"},