[BUG] LengthTokenFilter.min should not be mandatory

[robotmrv]

What is the bug?

after upgrading from opensearch-rest-high-level-client to opensearch-java client get index request fails with deserialization error.
stack trace from reproducer

Exception in thread "main" org.opensearch.client.util.MissingRequiredPropertyException: Missing required property 'LengthTokenFilter.min'
	at org.opensearch.client.util.ApiTypeHelper.requireNonNull(ApiTypeHelper.java:89)
	at org.opensearch.client.opensearch._types.analysis.LengthTokenFilter.<init>(LengthTokenFilter.java:59)
	at org.opensearch.client.opensearch._types.analysis.LengthTokenFilter.<init>(LengthTokenFilter.java:48)
	at org.opensearch.client.opensearch._types.analysis.LengthTokenFilter$Builder.build(LengthTokenFilter.java:142)
	at org.opensearch.client.opensearch._types.analysis.LengthTokenFilter$Builder.build(LengthTokenFilter.java:107)
	at org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:92)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at org.opensearch.client.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:81)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:201)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at org.opensearch.client.json.BuildFunctionDeserializer.deserialize(BuildFunctionDeserializer.java:65)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:60)
	at org.opensearch.client.json.UnionDeserializer$SingleMemberHandler.deserialize(UnionDeserializer.java:91)
	at org.opensearch.client.json.UnionDeserializer.deserialize(UnionDeserializer.java:331)
	at org.opensearch.client.json.UnionDeserializer.deserialize(UnionDeserializer.java:285)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at org.opensearch.client.json.JsonpDeserializerBase$StringMapDeserializer.deserialize(JsonpDeserializerBase.java:369)
	at org.opensearch.client.json.JsonpDeserializerBase$StringMapDeserializer.deserialize(JsonpDeserializerBase.java:355)
	at org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at org.opensearch.client.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:81)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:185)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:91)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at org.opensearch.client.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:81)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:185)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:91)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at org.opensearch.client.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:81)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:185)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:91)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at org.opensearch.client.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:81)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:185)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:91)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at org.opensearch.client.transport.endpoints.DictionaryResponse.lambda$setupDictionaryResponseDeserializer$0(DictionaryResponse.java:162)
	at org.opensearch.client.json.ObjectDeserializer.parseUnknownField(ObjectDeserializer.java:214)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:183)
	at org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:91)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at org.opensearch.client.transport.rest_client.RestClientTransport.decodeResponse(RestClientTransport.java:360)
	at org.opensearch.client.transport.rest_client.RestClientTransport.getHighLevelResponse(RestClientTransport.java:326)
	at org.opensearch.client.transport.rest_client.RestClientTransport.performRequest(RestClientTransport.java:148)
	at org.opensearch.client.opensearch.indices.OpenSearchIndicesClient.get(OpenSearchIndicesClient.java:720)
	at org.opensearch.client.opensearch.indices.OpenSearchIndicesClient.get(OpenSearchIndicesClient.java:734)
	at org.example.Main.main(Main.java:133)

How can one reproduce the bug?

use reproducer opensearch-client-index-deser.zip
run main method

What is the expected behavior?

get index request should not fail with org.opensearch.client.util.MissingRequiredPropertyException: Missing required property 'LengthTokenFilter.min' since it was never mandatory.

What is your host/environment?

Operating system, version.
using org.opensearch.client:opensearch-java:2.14.0

Do you have any additional context?

Add any other context about the problem.
initially we used elasticsearch and from its documentation it is clear
that there is default value 0 for min parameter https://www.elastic.co/guide/en/elasticsearch/reference/7.17/analysis-length-tokenfilter.html#analysis-length-tokenfilter-configure-parms

in opensearch documentation I cannot find mentions regarding default values of lenght token filter https://opensearch.org/docs/latest/analyzers/token-filters/index/
But since reproducer's index works properly looks like it is missing documentation.

[Xtansia]

Can confirm, according to opensearch-api-specification neither min nor max are required.

So can be fixed by eventual code-gen.