Trying to add bin/rails to an open_project:plugin generated engine

engine.rb

# Prevent load-order problems in case openproject-plugins is listed after a plugin in the Gemfile
# or not at all
require 'open_project/plugins'

module OpenProject::Todolist
  class Engine < ::Rails::Engine
    engine_name :openproject_todolist

    include OpenProject::Plugins::ActsAsOpEngine

    register 'openproject-todolist',
             :author_url => 'http://finn.de',
             :requires_openproject => '>= 3.0.0pre13'

  end
end

issue.txt

 $ cp ../dummyengine/bin ./ -R
 $ bin/rails g
/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require': cannot load such file -- /home/ssanders/RubymineProjects/openproject/plugins/openproject-todolist/lib/dummyengine/engine (LoadError)
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
        from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/engine/commands.rb:11:in `<top (required)>'
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
        from bin/rails:12:in `<main>'

$ rake rails:update:bin <--- trying to update to the new engine location
rake aborted!
LoadError: cannot load such file -- rails/tasks/engine.rake
/home/ssanders/RubymineProjects/openproject/plugins/openproject-todolist/Rakefile:18:in `load'
/home/ssanders/RubymineProjects/openproject/plugins/openproject-todolist/Rakefile:18:in `<top (required)>'
(See full trace by running task with --trace)

$ bin/rails g
/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require': cannot load such file -- open_project/plugins (LoadError)
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
        from /home/ssanders/RubymineProjects/openproject/plugins/openproject-todolist/lib/open_project/todolist/engine.rb:3:in `<top (required)>'
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
        from /var/lib/gems/2.3.0/gems/railties-4.2.6/lib/rails/engine/commands.rb:11:in `<top (required)>'
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
        from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
        from bin/rails:12:in `<main>'

rails

#!/usr/bin/env ruby
# This command will automatically be run when you run "rails" with Rails 4 gems installed from the root of your application.

ENGINE_ROOT = File.expand_path('../..', __FILE__)
ENGINE_PATH = File.expand_path('../../lib/open_project/todolist/engine', __FILE__)

# Set up gems listed in the Gemfile.
ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
require 'bundler/setup' if File.exist?(ENV['BUNDLE_GEMFILE'])

require 'rails/all'
require 'rails/engine/commands'

Rakefile

begin
  require 'bundler/setup'
rescue LoadError
  puts 'You must `gem install bundler` and `bundle install` to run rake tasks'
end

require 'rdoc/task'

RDoc::Task.new(:rdoc) do |rdoc|
  rdoc.rdoc_dir = 'rdoc'
  rdoc.title    = 'OpenprojectTodolist'
  rdoc.options << '--line-numbers'
  rdoc.rdoc_files.include('README.rdoc')
  rdoc.rdoc_files.include('lib/**/*.rb')
end

APP_RAKEFILE = File.expand_path("./test/dummy/Rakefile", __FILE__)
load 'rails/tasks/engine.rake'


load 'rails/tasks/statistics.rake'



Bundler::GemHelper.install_tasks

require 'rake/testtask'

Rake::TestTask.new(:test) do |t|
  t.libs << 'lib'
  t.libs << 'test'
  t.pattern = 'test/**/*_test.rb'
  t.verbose = false
end


task default: :test