RFR: JDK-8205985: Remove tools/javac/options/release/ReleaseOptionUnsupported.java from problem list

[Jan Lahoda]

Hi,

The langtools' test problem list excludes a test whose bug has been 
fixed, so I'd like to remove that exclude.

Webrev: http://cr.openjdk.java.net/~jlahoda/8205985/webrev.00/
Bug: https://bugs.openjdk.java.net/browse/JDK-8205985

Thanks,
    Jan