Added copyright 2018 statement

1. Why is this change necessary ?
 Added copyright 2018 statement on options_test.go and added space
between // and text on the comments.

Signed-off-by: gkGaneshR <gkganesh126@gmail.com>

cmd/options/options_test.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package options
 
 import (
@@ -13,7 +29,7 @@ type Options struct {
 	HostnameOverride string
 }
 
-//TestSetNodeNameOrDie tests for permutations of nodename, hostname and hostnameoverride
+// TestSetNodeNameOrDie tests for permutations of nodename, hostname and hostnameoverride
 func TestSetNodeNameOrDie(t *testing.T) {
 	options := map[string]struct {
 		Expected         Options
@@ -88,11 +104,11 @@ func TestSetNodeNameOrDie(t *testing.T) {
 		}
 
 		if opt.Expected.Hostname != "" {
-			//Changing hostname
+			// Changing hostname
 			cmd := exec.Command("hostname", opt.Expected.Hostname)
 			_, err := cmd.CombinedOutput()
 			if err != nil {
-				//If changing hostname requires admin privilege
+				// If changing hostname requires admin privilege
 				cmd = exec.Command("sudo", "hostname", opt.Expected.Hostname)
 				_, err := cmd.CombinedOutput()
 				if err != nil {
@@ -120,7 +136,7 @@ func TestSetNodeNameOrDie(t *testing.T) {
 		}
 
 	}
-
+	// Setting back the original attributes
 	err = os.Setenv("NODE_NAME", orig_node_name)
 	if err != nil {
 		fmt.Println("Unable to set original : env NODE_NAME")