[test] Fix unittest_i18n to run properly with "pytest -t" (closes #5576169) When running "pytest -t", many tests modules will be imported and run within a single python process. unittest_i18n fails when run after tests such as unittest_webtest.py or unittest_httptest.py. The main reason is that unittest_i18n does various tricks to add a test cube to the search path, which badly fails when a previous test module has already loaded "stuff" (for lack of a better word). Instead, let's just call the 'i18ncube' command with subprocess. The change from logilab.common.testlib to unittest is not directly needed, but comes as a free cleanup with the above changes.

/**
 *  functions specific to cubicweb on google appengine
 *
 *  :organization: Logilab
 *  :copyright: 2008-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 *  :contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
 */

/**
 * .. function:: rql_for_eid(eid)
 *
 * overrides rql_for_eid function from htmlhelpers.hs
 */
function rql_for_eid(eid) {
        return 'Any X WHERE X eid "' + eid + '"';
}