fixup! Add task to migration subscription to new prices

lib/tasks/subscriptions.rake

@@ -23,8 +23,8 @@ namespace :subscriptions do
   end
 
   def load_prices
-    old_price = AlaveteliPro::Price.retrieve(ENV['OLD_PRICE']) if ENV['OLD_PRICE']
-    new_price = AlaveteliPro::Price.retrieve(ENV['NEW_PRICE']) if ENV['NEW_PRICE']
+    old_price = Stripe::Price.retrieve(ENV['OLD_PRICE']) if ENV['OLD_PRICE']
+    new_price = Stripe::Price.retrieve(ENV['NEW_PRICE']) if ENV['NEW_PRICE']
 
     if !old_price
       puts "ERROR: Can't find OLD_PRICE"
@@ -35,6 +35,9 @@ namespace :subscriptions do
     elsif old_price.recurring != new_price.recurring
       puts "ERROR: Price interval and interval_count need to match"
       exit 1
+    elsif !AlaveteliPro::Price.list.map(&:id).include?(new_price.id)
+      puts "ERROR: New price is not defined in general.yml"
+      exit 1
     end
 
     [old_price, new_price]