reverted test_i_hierarchical_keyring to previous version

Author: RitvikKapila

examples/test/keyrings/test_i_hierarchical_keyring.py

@@ -11,5 +11,5 @@
 def test_encrypt_and_decrypt_with_keyring():
     """Test function for encrypt and decrypt using the AWS KMS Hierarchical Keyring example."""
     key_store_table_name = "KeyStoreDdbTable"
-    kms_key_id = "arn:aws:kms:us-west-2:370957321024:key/9d989aa2-2f9c-438c-a745-cc57d3ad0126"
-    encrypt_and_decrypt_with_keyring(key_store_table_name, key_store_table_name, kms_key_id)
+    key_arn = "arn:aws:kms:us-west-2:370957321024:key/9d989aa2-2f9c-438c-a745-cc57d3ad0126"
+    encrypt_and_decrypt_with_keyring(key_store_table_name, key_store_table_name, key_arn)