make ipv4 and ipv6 settings separate

src/sysinfo/interface.js

@@ -9,7 +9,8 @@
 exports = module.exports = {
     getServerIPv4,
     getServerIPv6,
-    testConfig
+    testIPv4Config,
+    testIPv6Config
 };
 
 const assert = require('assert'),
@@ -27,7 +28,13 @@ async function getServerIPv6(config) {
     throw new BoxError(BoxError.NOT_IMPLEMENTED, 'getServerIPv6 is not implemented');
 }
 
-async function testConfig(config) {
+async function testIPv4Config(config) {
+    assert.strictEqual(typeof config, 'object');
+
+    return null;
+}
+
+async function testIPv6Config(config) {
     assert.strictEqual(typeof config, 'object');
 
     return null;