[web] move qunit test back into web and fix the hanging qunit test can not work outside web. a lot of try/finally clause have been added to prevent qunit to hang on error. A not a test a indeed broken. But we at least put in them a running state again..

bgcolor = '#000000'
stylesheets = ['%s/cubicweb.css' % datadir_url]
logo = '%s/logo.png' % datadir_url
lazy = lazystr('%(bgcolor)s')