Add gsutil 4.13 to telemetry/third_party

tools/telemetry/third_party/gsutil/third_party/boto/tests/unit/sts/test_credentials.py

Index: tools/telemetry/third_party/gsutil/third_party/boto/tests/unit/sts/test_credentials.py
diff --git a/tools/telemetry/third_party/gsutil/third_party/boto/tests/unit/sts/test_credentials.py b/tools/telemetry/third_party/gsutil/third_party/boto/tests/unit/sts/test_credentials.py
new file mode 100644
index 0000000000000000000000000000000000000000..27a16ca72a81b02960376ccf700d76b128e67668
--- /dev/null
+++ b/tools/telemetry/third_party/gsutil/third_party/boto/tests/unit/sts/test_credentials.py
@@ -0,0 +1,38 @@
+import unittest
+
+from boto.sts.credentials import Credentials
+
+
+class STSCredentialsTest(unittest.TestCase):
+    sts = True
+
+    def setUp(self):
+        super(STSCredentialsTest, self).setUp()
+        self.creds = Credentials()
+
+    def test_to_dict(self):
+        # This would fail miserably if ``Credentials.request_id`` hadn't been
+        # explicitly set (no default).
+        # Default.
+        self.assertEqual(self.creds.to_dict(), {
+            'access_key': None,
+            'expiration': None,
+            'request_id': None,
+            'secret_key': None,
+            'session_token': None
+        })
+
+        # Override.
+        creds = Credentials()
+        creds.access_key = 'something'
+        creds.secret_key = 'crypto'
+        creds.session_token = 'this'
+        creds.expiration = 'way'
+        creds.request_id = 'comes'
+        self.assertEqual(creds.to_dict(), {
+            'access_key': 'something',
+            'expiration': 'way',
+            'request_id': 'comes',
+            'secret_key': 'crypto',
+            'session_token': 'this'
+        })