<Swing Dev> JDK 9 RFR of JDK-8034169: Fix serial lint warnings in javax.swing

[Joe Darcy]

Hello,

Please review the largely tedious but straightforward fix for

     JDK-8034169: Fix serial lint warnings in javax.swing
     http://cr.openjdk.java.net/~darcy/8034169.0/

With the change, all of java.swing and it subclasses compile cleanly 
with the lint warning enabled.

Generally the serial warnings were address by an 
@SuppressWarnings("serial") annotation; the annotation included a 
comment about the justification for the suppressions.

In a small percentage of cases, a serialVersionUID field was added. When 
such a field was added, the serialver computation was checked for 
consistency on JDK6 and JDK 8.

(Note that the javax.swing.text.html.parser.Element type has actually 
different serialVersionUIDs on JDK 6 and 8.)

Thanks,

-Joe