Add migration to 42 ex (#408)

* remind users to run the migration

* Ensured DJ migration is in correct place

* Re-add schema

* Indentation

example/rails-42/README.md

@@ -22,6 +22,7 @@ There are two methods of configuring Bugsnag within a Rails application:
 
 This is sufficient to start reporting unhandled exceptions to Bugsnag.
 
+
 ## Running the example
 
 Run the example using:
@@ -34,6 +35,11 @@ Once the server is running head to the default path for more information on Bugs
 
 # Running delayed job
 
+To run the delayed job example you'll need to first run a database migration:
+```shell
+bundle exec rake db:migrate
+```
+
 This example comes packaged with a delayed job setup to demonstrate how errors are reported through delayed job.  Once the rails setup is complete with an initializer at ```config/initializers/bugsnag.rb``` you don't need to do anything else with delayed job, just run the examples!
 
 The examples can be found at ```app/helpers/test_delayed_job_helper```

example/rails-42/db/schema.rb

@@ -12,7 +12,7 @@
 # It's strongly recommended that you check this file into your version control system.
 
 ActiveRecord::Schema.define(version: 20171006132129) do
-
+  
   create_table "delayed_jobs", force: :cascade do |t|
     t.integer  "priority",   default: 0, null: false
     t.integer  "attempts",   default: 0, null: false