Return class instead of class name

Author: lorenyu

app/models/flex/business_process_builder.rb

@@ -53,7 +53,7 @@ def start(step_name, on: nil, &handler)
       end
 
       def start_on_application_form_created(step_name)
-        event_name = "#{case_class.application_form_class}Created"
+        event_name = "#{case_class.application_form_class.name}Created"
         start(step_name, on: event_name) do |event|
           case_class.new(application_form_id: event[:payload][:application_form_id])
         end

app/models/flex/case.rb

@@ -38,7 +38,7 @@ def self.base_attributes_for_generator
     # @example
     #   PassportCase.application_form_class #=> "PassportApplicationForm"
     def self.application_form_class
-      name.sub("Case", "ApplicationForm")
+      name.sub("Case", "ApplicationForm").constantize
     end
     attribute :application_form_id, :uuid