Fix mysql_user for python3 (#4576)
Fix mysql_user for python3 (#4576)

dict no longer have a iteritems method, it was replaced
by items. So we need to use six.

    Traceback (most recent call last):
      File \"/tmp/ansible_hjd7d65c/ansible_module_mysql_user.py\", line 587, in <module>
        main()
      File \"/tmp/ansible_hjd7d65c/ansible_module_mysql_user.py\", line 571, in main
        changed = user_add(cursor, user, host, host_all, password, encrypted, priv, module.check_mode)
      File \"/tmp/ansible_hjd7d65c/ansible_module_mysql_user.py\", line 239, in user_add
        for db_table, priv in new_priv.iteritems():
    AttributeError: 'dict' object has no attribute 'iteritems'

thaim/ansible,thaim/ansible