Fix HW Version claim expected length

www.psacertified.org issuing HW versions of format '[0-9]{13}-[0-9]{5}'.
It is called 'certification reference':
https://www.psacertified.org/certified-products/

Signed-off-by: Tamas Ban <tamas.ban@arm.com>
Change-Id: I0417e1ce76896f1128864676f29a4314b3fd1fb8
diff --git a/iat-verifier/tests/test_verifier.py b/iat-verifier/tests/test_verifier.py
index 417e220..5f8380e 100644
--- a/iat-verifier/tests/test_verifier.py
+++ b/iat-verifier/tests/test_verifier.py
@@ -169,17 +169,19 @@
             create_and_read_iat(
                 DATA_DIR,
                 'invalid-hw-version.yaml',
-                PSAIoTProfile1TokenVerifier(method=method,
+                PSAIoTProfile1TokenVerifier(
+                method=method,
                 cose_alg=cose_alg,
                 signing_key=signing_key,
                 configuration=keep_going_conf))
-            self.assertIn("Invalid HARDWARE_VERSION length; must be 13 digits, found 10 characters",
+            self.assertIn("Invalid HARDWARE_VERSION length; "
+                            "must be 19 characters, found 10 characters",
                          test_ctx.records[0].getMessage())
-            self.assertIn("Invalid digit   at position 1",
+            self.assertIn("Invalid character   at position 1",
                          test_ctx.records[1].getMessage())
-            self.assertIn("Invalid digit - at position 4",
+            self.assertIn("Invalid character - at position 4",
                          test_ctx.records[2].getMessage())
-            self.assertIn("Invalid digit a at position 10",
+            self.assertIn("Invalid character a at position 10",
                          test_ctx.records[3].getMessage())
 
     def test_binary_string_decoding(self):