Update tests for site setting requirements

Author: nattsw

spec/system/anon_language_switcher_spec.rb

@@ -12,6 +12,7 @@
     SiteSetting.translator_enabled = true
     SiteSetting.allow_user_locale = true
     SiteSetting.set_locale_from_cookie = true
+    SiteSetting.automatic_translation_backfill_maximum_translations_per_hour = 1
     SiteSetting.automatic_translation_target_languages = "es|ja"
     SiteSetting.experimental_anon_language_switcher = true
     visit("/")

spec/system/full_page_translation_spec.rb

@@ -33,7 +33,6 @@
       SiteSetting.allow_user_locale = true
       SiteSetting.set_locale_from_cookie = true
       SiteSetting.set_locale_from_param = true
-      SiteSetting.experimental_anon_language_switcher = true
       SiteSetting.experimental_inline_translation = true
     end