Disable checkstyleTest task during Gradle check
Disable checkstyleTest task during Gradle check

We run only `checkstyleMain` during regular builds which checks the style of the
main source files, not the test source files.

However, the `check` task also includes `checkstyleTest`. Since we currently
don't enforce style of our tests, it makes sense to disable the check.

EvilMcJerkface/crate,EvilMcJerkface/crate,crate/crate,crate/crate,crate/crate,EvilMcJerkface/crate