Add integration task

Add missing gate integration task, but use the one from
Common cookbook to make future updates easy.

Change-Id: I3682934a800af32b6966d21b5b942799aae700bc

Rakefile

@@ -2,29 +2,44 @@ task default: ["test"]
 
 task :test => [:lint, :style, :knife, :unit]
 
+desc "Vendor the cookbooks in the Berksfile"
 task :berks_prep do
   sh %{chef exec berks vendor}
 end
 
+desc "Run FoodCritic (lint) tests"
 task :lint do
   sh %{chef exec foodcritic --epic-fail any --tags ~FC003 --tags ~FC023 .}
 end
 
+desc "Run knife tests"
 task :knife => :berks_prep do
   sh %{chef exec knife cookbook test openstack-integration-test -o berks-cookbooks}
 end
 
+desc "Run RuboCop (style) tests"
 task :style do
   sh %{chef exec rubocop}
 end
 
+desc "Run RSpec (unit) tests"
 task :unit => :berks_prep do
   sh %{chef exec rspec --format documentation}
 end
 
+desc "Remove the berks-cookbooks directory and the Berksfile.lock"
 task :clean do
   rm_rf [
     'berks-cookbooks',
     'Berksfile.lock'
   ]
 end
+
+desc "All-in-One Neutron build Infra using Common task"
+task :integration do
+  # Use the common integration task
+  sh %(wget -nv -t 3 -O Rakefile-Common https://raw.githubusercontent.com/openstack/cookbook-openstack-common/master/Rakefile)
+  load './Rakefile-Common'
+  Rake::Task["common_integration"].invoke
+end
+