updated default who changed oqs in queue job

app/jobs/order_queue_processor_job.rb

@@ -1,5 +1,5 @@
 class OrderQueueProcessorJob < ApplicationJob
-  queue_as :oqs
+  queue_as :default
 
   def perform(order_id)
     # Do something later

db/migrate/20170602093159_create_print_settings.rb

@@ -3,10 +3,10 @@ class CreatePrintSettings < ActiveRecord::Migration[5.1]
     create_table :print_settings do |t|
       t.string  :name, :null => false
       t.string  :unique_code, :null => false
-      t.string  :template, :null => false
-      t.string  :db_name, :null => false
-      t.string  :db_type, :null => false
-      t.string  :db_username, :null => false
+      t.string  :template
+      t.string  :db_name 
+      t.string  :db_type
+      t.string  :db_username
       t.string  :db_password
       t.string  :printer_name, :null => false
       t.string  :api_settings