Don't allow an order to transition to complete if payment is required and payments don't exist
Don't allow an order to transition to complete if payment is required and payments don't exist

Tentative fix for issue brought up here https://github.com/spree/spree/commit/e9ad6c7a3deb107152a003bbbfc5d80947bb1832#commitcomment-2252676

lzcabrera/spree-1-3-stable,lzcabrera/spree-1-3-stable,lzcabrera/spree-1-3-stable