add test case for container list

Signed-off-by: jason yang <jasonyangshadow@gmail.com>

internal/app/wwctl/profile/list/main_test.go

@@ -54,6 +54,7 @@ WW_INTERNAL: 0
 			baseCmd.SetOut(nil)
 			baseCmd.SetErr(nil)
 			stdoutR, stdoutW, _ := os.Pipe()
+			oriout := os.Stdout
 			os.Stdout = stdoutW
 			err = baseCmd.Execute()
 			if err != nil {
@@ -67,6 +68,7 @@ WW_INTERNAL: 0
 				stdoutC <- buf.String()
 			}()
 			stdoutW.Close()
+			os.Stdout = oriout
 
 			stdout := <-stdoutC
 			stdout = strings.TrimSpace(stdout)