More pylint errors

Author: mmegs-amzn

src/aws_encryption_sdk/keyring/raw_keyring.py

@@ -288,9 +288,9 @@ def on_encrypt(self, encryption_materials):
 
             # EncryptedData to EncryptedDataKey
             encrypted_data_key = serialize_wrapped_key(
-                key_provider=key_provider,
-                wrapping_algorithm=wrapping_algorithm,
-                wrapping_key_id=key_name,
+                key_provider=self._key_provider,
+                wrapping_algorithm=self._wrapping_algorithm,
+                wrapping_key_id=self._key_name,
                 encrypted_wrapped_key=encrypted_wrapped_key,
             )
 
@@ -338,12 +338,14 @@ def on_decrypt(self, decryption_materials, encrypted_data_keys):
                     if plaintext_data_key:
                         # Create a keyring trace
                         keyring_trace = KeyringTrace(
-                            wrapping_key=key_provider, flags={KeyringTraceFlag.WRAPPING_KEY_DECRYPTED_DATA_KEY}
+                            wrapping_key=self._key_provider, flags={KeyringTraceFlag.WRAPPING_KEY_DECRYPTED_DATA_KEY}
                         )
 
                         # Update decryption materials
                         data_encryption_key = RawDataKey(
-                            key_provider=MasterKeyInfo(provider_id=key_provider.provider_id, key_info=key_name),
+                            key_provider=MasterKeyInfo(
+                                provider_id=self._key_provider.provider_id, key_info=self.key_name
+                            ),
                             data_key=plaintext_data_key,
                         )
                         decryption_materials.add_data_encryption_key(data_encryption_key, keyring_trace)