test migrated and fixed, @Browser annotation removed, missing stubs added

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9500 5f5364db-9458-4db8-a492-e30667be6df6
JavaScript: XMLHttpRequest: overrideMimeType() to handle charset (Chrome and FF).

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9501 5f5364db-9458-4db8-a492-e30667be6df6
Add XMLHttpRequestTest.overrideMimeType_charset_all() as @NYI
Issue 1623

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9502 5f5364db-9458-4db8-a492-e30667be6df6
checkstyle

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9503 5f5364db-9458-4db8-a492-e30667be6df6
docs

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9504 5f5364db-9458-4db8-a492-e30667be6df6
Code style, no UTF-8 characters in code

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9505 5f5364db-9458-4db8-a492-e30667be6df6