move touch option on message model, remove optional on record model

Author: sairamsrinivasan

spec/models/record.rb

@@ -3,5 +3,5 @@
 class Record
   include Mongoid::Document
 
-  belongs_to :user, inverse_of: :record, touch: :record_updated_at, optional: true
+  belongs_to :user, inverse_of: :record, touch: :record_updated_at
 end