Move test setup to application.rb

Without spree_core, the test environment file loads before the Spree engine is loaded

config/application.rb

@@ -23,6 +23,11 @@ module Openfoodnetwork
       end
     end
 
+    config.after_initialize do
+      # We need this here because the test env file loads before the Spree engine is loaded
+      Spree::Core::Engine.routes.default_url_options[:host] = 'test.host' if Rails.env = 'test'
+    end
+
     initializer "spree.environment", before: :load_config_initializers do |app|
       app.config.spree = Spree::Core::Environment.new
       Spree::Config = app.config.spree.preferences # legacy access

config/environments/test.rb

@@ -55,4 +55,3 @@ end
 
 # Allows us to use _url helpers in Rspec
 Rails.application.routes.default_url_options[:host] = 'test.host'
-Spree::Core::Engine.routes.default_url_options[:host] = 'test.host'