Add license detection test

Reference: #3532
Reported-by: Omair Majid @omajid
Signed-off-by: Philippe Ombredanne <[email protected]>

Author: pombredanne

tests/licensedcode/data/datadriven/lic4/CreateTokenTests-short.cs

@@ -0,0 +1,8 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System.Security.Claims;
+using BenchmarkDotNet.Attributes;
+using Microsoft.IdentityModel.JsonWebTokens;
+using Microsoft.IdentityModel.TestUtils;
+using Microsoft.IdentityModel.Tokens;

tests/licensedcode/data/datadriven/lic4/CreateTokenTests-short.cs.yml

@@ -0,0 +1,2 @@
+license_expressions:
+  - mit