fix(s3): normalize GetObjectAttributes ETag XML response (#2002)

scripts/s3-tests/implemented_tests.txt

@@ -20,7 +20,7 @@
 # - SSE-C: Server-side encryption with customer-provided keys
 # - Object ownership: Bucket ownership controls
 #
-# Total: 159 tests
+# Total: 174 tests
 
 test_basic_key_count
 test_bucket_create_naming_bad_short_one
@@ -153,6 +153,9 @@ test_upload_part_copy_percent_encoded_key
 test_api_error_from_storage_error_mappings
 test_get_object_torrent
 
+# Object attributes
+test_get_checksum_object_attributes
+
 # SSE-C encryption tests
 test_encryption_sse_c_method_head
 test_encryption_sse_c_present
@@ -200,3 +203,12 @@ test_object_put_acl_mtime
 
 # Object ownership
 test_create_bucket_no_ownership_controls
+
+# Bucket encryption
+test_put_bucket_encryption_kms
+test_put_bucket_encryption_s3
+test_get_bucket_encryption_kms
+test_get_bucket_encryption_s3
+test_delete_bucket_encryption_kms
+test_delete_bucket_encryption_s3
+test_lifecycle_expiration_days0