empty default for comments_service_key and comments_url because it was breaking configs that do not have it in env.json

Remove the csrf domain from the default settings because we don't need it (we don't have requests going between multiple servers in the same domain). This will make it so that we can test servers from any url, rather than just a single url

Remove the csrf domain from the default settings because we don't need it (we don't have requests going between multiple servers in the same domain). This will make it so that we can test servers from any url, rather than just a single url

--HG--
branch : pmitros-dormsbee-settings2
rename : settings_new_askbot.py => settings.py