Create a rake task for writing plugin ansible content to a directory

This task will be used to create an rpm for providing plugin
ansible content to the embedded ansible container image

https://www.pivotaltracker.com/story/show/157313841

lib/tasks/evm.rake

@@ -130,4 +130,10 @@ namespace :evm do
     end
     EvmDatabase.raise_server_event(opts[:event])
   end
+
+  desc "Write all plugin ansible content to a directory"
+  task :write_plugin_ansible_content => :environment do
+    dest_dir = ENV["ANSIBLE_CONTENT_DIR"] || Rails.root.join("tmp", "ansible_content")
+    EmbeddedAnsible.consolidate_plugin_playbooks(dest_dir)
+  end
 end