Remove the extra curly braces for format_ssl_ciphers

Fixes issue #259

Author: wenchma

libraries/default.rb

@@ -44,7 +44,7 @@ def format_ssl_versions
     end
 
     def format_ssl_ciphers
-      Array(node['rabbitmq']['ssl_ciphers']).map { |n| "{#{n}}" }.join(',')
+      Array(node['rabbitmq']['ssl_ciphers']).map { |n| "'#{n}'" }.join(',')
     end
   end
 end

spec/default_spec.rb

@@ -95,14 +95,14 @@
       node.set['rabbitmq']['ssl'] = true
       node.set['rabbitmq']['ssl_ciphers'] = ['ecdhe_ecdsa,aes_128_cbc,sha256', 'ecdhe_ecdsa,aes_256_cbc,sha']
       expect(chef_run).to render_file('/etc/rabbitmq/rabbitmq.config').with_content(
-                            '{ciphers,[{ecdhe_ecdsa,aes_128_cbc,sha256},{ecdhe_ecdsa,aes_256_cbc,sha}]}')
+                            "{ciphers,['ecdhe_ecdsa,aes_128_cbc,sha256','ecdhe_ecdsa,aes_256_cbc,sha']}")
     end
 
     it 'allows web console ssl ciphers' do
       node.set['rabbitmq']['web_console_ssl'] = true
       node.set['rabbitmq']['ssl_ciphers'] = ['ecdhe_ecdsa,aes_128_cbc,sha256', 'ecdhe_ecdsa,aes_256_cbc,sha']
       expect(chef_run).to render_file('/etc/rabbitmq/rabbitmq.config').with_content(
-                            '{ciphers,[{ecdhe_ecdsa,aes_128_cbc,sha256},{ecdhe_ecdsa,aes_256_cbc,sha}]}')
+                            "{ciphers,['ecdhe_ecdsa,aes_128_cbc,sha256','ecdhe_ecdsa,aes_256_cbc,sha']}")
     end
 
     it 'should set additional rabbitmq config' do