Review request for JDK-8008312: Re-enable MethodParameter tests in JDK

[Eric McCorkle]

Hi,

Please review this simple patch, which re-enables the JDK end-to-end
tests for parameter reflection.

It also fixes a small error in toString

The webrev is here
http://cr.openjdk.java.net/~emc/8008312/

Thanks,
Eric