v3(services): properly audit all of message when creating service instance

[#172644751](https://www.pivotaltracker.com/story/show/172644751)

Author: Brian Butz

app/actions/service_instance_create_managed.rb

@@ -44,6 +44,7 @@ def create(message)
         creation_job = V3::CreateServiceInstanceJob.new(
           instance.guid,
           arbitrary_parameters: message.parameters,
+          request_attr: message.audit_hash,
           user_audit_info: service_event_repository.user_audit_info
         )
         pollable_job = Jobs::Enqueuer.new(creation_job, queue: Jobs::Queues.generic).enqueue_pollable

app/jobs/v3/create_service_instance_job.rb

@@ -3,9 +3,15 @@
 module VCAP::CloudController
   module V3
     class CreateServiceInstanceJob < ServiceInstanceAsyncJob
-      def initialize(service_instance_guid, arbitrary_parameters: {}, user_audit_info:)
+      def initialize(
+        service_instance_guid,
+        arbitrary_parameters: {},
+        request_attr: {},
+        user_audit_info:
+      )
         super(service_instance_guid, user_audit_info)
-        @request_attr = arbitrary_parameters
+        @request_attr = request_attr
+        @arbitrary_parameters = arbitrary_parameters
       end
 
       def operation
@@ -20,7 +26,7 @@ def send_broker_request(client)
         client.provision(
           service_instance,
           accepts_incomplete: true,
-          arbitrary_parameters: @request_attr,
+          arbitrary_parameters: @arbitrary_parameters,
           maintenance_info: service_instance.service_plan.maintenance_info
         )
       end