RFR: JDK-8241292: Interactive Search results are not highlighted as they used to be

[Jonathan Gibbons]

Please review a very simple fix for the reported regression.  The fix is 
just to update the search.js file with the hyphenated class names.

Since there is no compile-time check between the contents of a 
JavaScript file and the contents of a stylesheet file, I've updated 
TestSearch.java to check that any CSS class names referenced in the 
JavaScript file also appear in the stylesheet file.

Note: there is another old-style stylesheet files with camelCase names 
in the test directory, that could be updated at some point.
open/test/langtools/jdk/javadoc/doclet/testOptions/custom-stylesheet.css
This file exists to help test options, and the content does not appear 
to be important.  Updating it can be done separately.

-- Jon

JBS: https://bugs.openjdk.java.net/browse/JDK-8241292
Webrev: http://cr.openjdk.java.net/~jjg/8241292/webrev.00/index.html