Upgrade AWS SDK to the latest version

vendor/github.com/aws/aws-sdk-go/awstesting/assert.go

@@ -149,8 +149,8 @@ func objectsAreEqual(expected, actual interface{}) bool {
 // Copied locally to prevent non-test build dependencies on testify
 func equal(t *testing.T, expected, actual interface{}, msgAndArgs ...interface{}) bool {
 	if !objectsAreEqual(expected, actual) {
-		t.Errorf("Not Equal:\n\t%#v (expected)\n\t%#v (actual), %s",
-			expected, actual, messageFromMsgAndArgs(msgAndArgs))
+		t.Errorf("%s\n%s", messageFromMsgAndArgs(msgAndArgs),
+			SprintExpectActual(expected, actual))
 		return false
 	}
 
@@ -188,3 +188,9 @@ func queryValueKeys(v url.Values) []string {
 	sort.Strings(keys)
 	return keys
 }
+
+// SprintExpectActual returns a string for test failure cases when the actual
+// value is not the same as the expected.
+func SprintExpectActual(expect, actual interface{}) string {
+	return fmt.Sprintf("expect: %+v\nactual: %+v\n", expect, actual)
+}