Correct default glue setting for Java

I noticed the default glue setting for Java projects is slightly incorrect.

Current setting:

https://github.com/cucumber/vscode/blob/0c380d3ddaf8902501255d397a7c2b395149415b/package.json#L78

However, for typical Java projects the path will be: `src/test/java/**/*.java`

Ideally, the setting would be: `**/src/test/java/**/*.java` so that multi-module projects are handled.