RFR - JDK-8212975 ClassDesc should have a full name method

[Jim Laskey]

ClassDesc.displayName(boolean detail) allows the user the option to fetch the 
fully qualified class name.

webrev: http://cr.openjdk.java.net/~jlaskey/8212975/webrev-02 
<http://cr.openjdk.java.net/~jlaskey/8212975/webrev-02>
JBS: https://bugs.openjdk.java.net/browse/JDK-8212975 
<https://bugs.openjdk.java.net/browse/JDK-8212975>

Thank you.

Cheers,

- Jim