disable one failing test, need a bit time to figure out what is wrong here

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8592 5f5364db-9458-4db8-a492-e30667be6df6
use the correct accept header for javascript requests

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8593 5f5364db-9458-4db8-a492-e30667be6df6
code style fix

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8594 5f5364db-9458-4db8-a492-e30667be6df6
fix another selector issues, our selector validation was missing a check

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8595 5f5364db-9458-4db8-a492-e30667be6df6