Basile Chapellier

### What is the bug? In class `NodeJvmInfo` at row [94](https://github.com/opensearch-project/opensearch-java/blob/main/java-client/src/main/java/org/opensearch/client/opensearch/nodes/info/NodeJvmInfo.java#L94) the field `usingBundledJdk` is expected as not null but in server side code, this field is nullable https://github.com/opensearch-project/OpenSearch/blob/main/server/src/main/java/org/opensearch/monitor/jvm/JvmInfo.java#L235 https://github.com/opensearch-project/OpenSearch/blob/main/server/src/main/java/org/opensearch/monitor/jvm/JvmInfo.java#L310...