generate valkyrie Monograph into the test application last

Ensures `GenericWork` remains the "primary concern" for Hyrax, by keeping it at
the top of the registry.

We should really consider a better approach for determining the "primary
concern", and also reducing the amount code that depends on this dubious
concept.

spec/test_app_templates/lib/generators/test_app_generator.rb

@@ -13,10 +13,6 @@ def browse_everything_install
     generate "browse_everything:install --skip-assets"
   end
 
-  def create_work
-    generate 'hyrax:work_resource Monograph'
-  end
-
   def create_generic_work
     generate 'hyrax:work GenericWork'
   end
@@ -38,6 +34,10 @@ def create_nested_work
               EOS
   end
 
+  def create_work
+    generate 'hyrax:work_resource Monograph'
+  end
+
   def create_time_span
     create_file 'app/models/time_span.rb' do
       <<-EOS.strip_heredoc