Fix to override rake being execute out of binstub context

capistranosucks.rb

new_hash = {
  :rake => "bundle exec bin/rake"
}

namespace :bundler do
  task :map_bins do
    fetch(:bundle_bins).each do |command|
      SSHKit.config.command_map = SSHKit.config.command_map.defaults.merge!(new_hash)
    end
  end
end