[BUG] PutTemplateRequest _DESERIALIZER not able to parse the name

[chenqi0805]

What is the bug?

Cannot get template name populated through deserializer

How can one reproduce the bug?

final JsonpMapper mapper = openSearchClient._transport().jsonpMapper();
final JsonpMapper mapper1 = new PreSerializedJsonpMapper();
final Map<String, Object> indexTemplateMap = readIndexTemplate();
indexTemplateMap.put("name", "test-template");
indexTemplateMap.put("index_patterns", "test-index-*");
final String indexTemplate = new ObjectMapper().writeValueAsString(indexTemplateMap);
// Parse byte array to Map
final ByteArrayInputStream byteIn = new ByteArrayInputStream(indexTemplate.getBytes(StandardCharsets.UTF_8));
final JsonParser parser = mapper1.jsonProvider().createParser(byteIn);
final PutTemplateRequest putTemplateRequest = PutTemplateRequest._DESERIALIZER.deserialize(parser, mapper1);

What is the expected behavior?

A clear and concise description of what you expected to happen.

What is your host/environment?

Operating system, version.

Do you have any screenshots?

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Do you have any additional context?

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[wbeckler]

Feel free to add a fix. Is this blocking data-prepper?

[Bfindlay]

I have also been encountering this.
I have raised a PR #723