Minor Description
Similar to MJAVADOC-668, it would be good to improve the <jdkToolchain> parameter documentation.
The current documentation only mentions that it represents "requirements for this jdk toolchain", but it is not exactly clear what the syntax for these requirements is, or to what they apply.
It might be good to use Surefire's documentation as reference, which hints that the <jdkToolchain> specifies the requirements for the <provides> values of the JDK toolchains.