RFR 8075884, new tests to check runtime usage with Multi-Release jars

[Felix Yang]

Hi there,

    please review the following new tests to check runtime usage with 
Multi-Release jars.

Bug:

    https://bugs.openjdk.java.net/browse/JDK-8075884

Webrev:

    http://cr.openjdk.java.net/~xiaofeya/8075884/webrev.00/

Thanks,

Felix