Fix SSL/Certificate authentication

See ticket #59

Author: syserr0r

src/EntityFramework6.Npgsql/NpgsqlServices.cs

@@ -183,7 +183,7 @@ static void UsingPostgresDbConnection(NpgsqlConnection connection, Action<Npgsql
                 Pooling = false
             };
 
-            using (var masterConnection = new NpgsqlConnection(connectionBuilder.ConnectionString))
+            using (var masterConnection = connection.CloneWith(connectionBuilder.ConnectionString))
             {
                 masterConnection.Open();//using's Dispose will close it even if exception...
                 action(masterConnection);