Add Remote::FS#remote attribute reader

lib/producer/core/remote/fs.rb

@@ -4,6 +4,8 @@ module Producer
       class FS
         require 'net/sftp'
 
+        attr_reader :remote
+
         def initialize(remote)
           @remote = remote
         end

spec/producer/core/remote/fs_spec.rb

@@ -7,7 +7,7 @@ module Producer::Core
 
     describe '#new' do
       it 'assigns the remote given as argument' do
-        expect(fs.instance_eval { @remote }).to be remote
+        expect(fs.remote).to be remote
       end
     end