Fix some golint errors for packages in pkg/kubectl/cmd

Co-authored-by: Arijit Basu <sayanarijit@gmail.com>

pkg/kubectl/cmd/create/create_namespace.go

@@ -36,6 +36,7 @@ var (
 	  kubectl create namespace my-namespace`))
 )
 
+// NamespaceOpts is the options for 'create namespare' sub command
 type NamespaceOpts struct {
 	CreateSubcommandOptions *CreateSubcommandOptions
 }
@@ -68,6 +69,7 @@ func NewCmdCreateNamespace(f cmdutil.Factory, ioStreams genericclioptions.IOStre
 	return cmd
 }
 
+// Complete completes all the required options
 func (o *NamespaceOpts) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
 	name, err := NameFromCommandArgs(cmd, args)
 	if err != nil {
@@ -85,7 +87,7 @@ func (o *NamespaceOpts) Complete(f cmdutil.Factory, cmd *cobra.Command, args []s
 	return o.CreateSubcommandOptions.Complete(f, cmd, args, generator)
 }
 
-// CreateNamespace implements the behavior to run the create namespace command
+// Run calls the CreateSubcommandOptions.Run in NamespaceOpts instance
 func (o *NamespaceOpts) Run() error {
 	return o.CreateSubcommandOptions.Run()
 }