Added connect with md5 password

test_setup.sql

@@ -1,7 +1,9 @@
 drop database if exists pgx_test;
 drop user if exists pgx_none;
 drop user if exists pgx_pw;
+drop user if exists pgx_md5;
 
 create user pgx_none;
 create user pgx_pw password 'secret';
+create user pgx_md5 password 'secret';
 create database pgx_test;