remove common/net unit test back.

common/net/testing/unit/address_test.go → common/net/address_test.go

@@ -1,4 +1,4 @@
-package unit
+package net_test
 
 import (
 	"net"

common/net/testing/unit/destination_test.go → common/net/destination_test.go

@@ -1,4 +1,4 @@
-package unit
+package net_test
 
 import (
 	"testing"

common/net/testing/unit/unit.go

@@ -1,3 +0,0 @@
-package unit
-
-// Placeholder. Golang doesn't like folders full of test files.

common/net/testing/unit/transport_test.go → common/net/transport_test.go

@@ -1,4 +1,4 @@
-package unit
+package net_test
 
 import (
 	"bytes"