[1.7.x] Renamed an admin_views test to fix ordering issue.

test_i18n_language_non_english_fallback fails if run after
test_L10N_deactivated; the tests can be run in any order after
a5f6cbce07b5f3ab48d931e3fd1883c757fb9b45 but this commit is not
in stable/1.7.x.