define accessible attrs for SisBatch, Story

Change-Id: Ia17b9aa6c159be611b9f0bda4377b5fd524093f6
Reviewed-on: https://gerrit.instructure.com/3876
Tested-by: Hudson <hudson@instructure.com>
Reviewed-by: Brian Palmer <brianp@instructure.com>

app/models/sis_batch.rb

@@ -27,7 +27,7 @@ class SisBatch < ActiveRecord::Base
   belongs_to :batch_mode_term, :class_name => 'EnrollmentTerm'
 
   attr_accessor :zip_path
-  attr_accessible
+  attr_accessible :batch_mode, :batch_mode_term
   
   def self.max_attempts
     5

spec/models/general_model_spec.rb

@@ -49,7 +49,8 @@ describe 'Models' do
         ActiveRecord::Base,
         ActiveRecord::SessionStore::Session,
         Delayed::Backend::ActiveRecord::Job,
-        Version
+        Version,
+        Story
       ]
     (ignore_classes << AddThumbnailUuid::Thumbnail) rescue nil
     (ignore_classes << CustomField) rescue nil