Alchemy 8: Rename Alchemy::PageLayout to PageDefinitions

Author: mamhoff

spec/models/user_spec.rb

@@ -239,7 +239,7 @@ module Alchemy
       let(:user) { create(:alchemy_admin_user) }
       let(:page) { create(:alchemy_page) }
 
-      before { allow(Alchemy::PageLayout).to receive(:get).and_return({}) }
+      before { allow(Alchemy::PageDefinition).to receive(:get).and_return({}) }
 
       it "should return all pages that are locked by user" do
         user.save!