tests utilityfor error check adaptation due to aws-sdk migration

Author: benzekrimaha

tests/utilities/bucketTagging-util.js

@@ -5,11 +5,11 @@ function assertError(err, expectedErr) {
     if (expectedErr === null) {
         assert.strictEqual(err, null, `expected no error but got '${err}'`);
     } else {
-        assert.strictEqual(err.code, expectedErr, 'incorrect error response ' +
-            `code: should be '${expectedErr}' but got '${err.code}'`);
-        assert.strictEqual(err.statusCode, errors[expectedErr].code,
+        assert.strictEqual(err.Code, expectedErr, 'incorrect error response ' +
+            `code: should be '${expectedErr}' but got '${err.Code}'`);
+        assert.strictEqual(err.$metadata.httpStatusCode, errors[expectedErr].code,
             'incorrect error status code: should be  ' +
-            `${errors[expectedErr].code}, but got '${err.statusCode}'`);
+            `${errors[expectedErr].code}, but got '${err.$metadata.httpStatusCode}'`);
     }
 }