RFR: 8165017: Additional test coverage of the JDWP CLASSLOADER and MODULE commands

[Alexander Kulyakhtin]

Hi,

Could you, please, review this test-only change

CR: https://bugs.openjdk.java.net/browse/JDK-8165017 "Additional test coverage of the JDWP CLASSLOADER and MODULE commands"
Webrev: http://cr.openjdk.java.net/~akulyakh/8165017_03/

The verification of the new JDWP 'MODULE' command has been added to the existing test. 
The test now verifies that among the classes visible to the classloader of the 'java.base' module there are, indeed, classes that report the 'java.base' module as the module they belong to. 
The test verifies this by sending the 'MODULE' JDWP command passing the class id as a command parameter and checking the reply.

Best regards,
Alexander