 Add shared util.rb file with create_ssl_ctx method
 Removes duplicated code in ftp, imap, & smtp
 diff --git a/test/net/ftp/test_ftp.rb b/test/net/ftp/test_ftp.rb
-index a5219644bb..1127d85649 100644
+index 39f1220dbb..be1d27aac4 100644
 --- a/test/net/ftp/test_ftp.rb
 +++ b/test/net/ftp/test_ftp.rb
 @@ -6,6 +6,7 @@

                          private_data_connection: false,
                          passive: true)
       begin
@@ -2071,7 +2041,7 @@ def test_tls_connect_timeout
         assert_raise(Net::OpenTimeout) do
           Net::FTP.new(SERVER_NAME,
                        port: port,

                          private_data_connection: false,
                          passive: false)
       begin
@@ -2001,14 +1978,7 @@ def test_passive_clear_data_connection
           sock.print("220 (test_ftp).\r\n")
           commands.push(sock.gets)
           sock.print("234 AUTH success.\r\n")
