Suggestion: Queries for test code should show results despite test classifier

LGTM [classifies files](https://lgtm.com/help/lgtm/file-classification) and then omits files with a classifier from the results. This also includes test code.

However, often queries are explicitly written for test code, because broken test code can be nearly as problematic as broken production code. For the Java library there even exists an [`Assertions` module](https://codeql.github.com/codeql-standard-libraries/java/semmle/code/java/frameworks/Assertions.qll/module.Assertions.html) covering some unit test classes and methods.
It would therefore be good if queries could, for example as part of their [metadata](https://codeql.github.com/docs/writing-codeql-queries/metadata-for-codeql-queries/), specify that their results should also be reported for code classified as test.