fix manage_projects with MySQL-Python 1.2.5

MySQL-Python version 1.2.5 execute command only works with dictionary or tuple, older
versions worked with strings.  This patch makes manage_projects.py compatible with
newer version of MySQL-Python.

Change-Id: I502d2f1da3eef8e4c3a907ad7fe2957a325118d9
Closes-Bug: #1273558