**Is your feature request related to a problem?** Coming from https://github.com/opensearch-project/opensearch-plugins/issues/138, some obsolete ALv2 headers are still present, e.g. [here](https://github.com/opensearch-project/security/blob/2972bd15a98dbaa8c571b9b302268de076d20ee0/src/test/java/org/opensearch/security/TracingTests.java#L17). **What solution would you like?** 1. Add automated license header Gradle checks to CI similar to [this](https://github.com/opensearch-project/asynchronous-search/commit/bc483fe7a253d20216ce5fc4d5427e42819b7aaf). 2. Update the default header for all new files created by IDEs similar to https://github.com/opensearch-project/OpenSearch/pull/510. 3. Fix any incorrect headers. **Do you have any additional context?** Licenses must match https://github.com/opensearch-project/opensearch-plugins/blob/main/HEADERS.md
Is your feature request related to a problem?
Coming from opensearch-project/opensearch-plugins#138, some obsolete ALv2 headers are still present, e.g. here.
What solution would you like?
Do you have any additional context?
Licenses must match https://github.com/opensearch-project/opensearch-plugins/blob/main/HEADERS.md