Parameterize database connection in test.py
Parameterize database connection in test.py

Make more of the db connection options into parameters instead of CONF
values so that they behave better when testing multiple DB back-ends,
as with the baremetal driver.

Change-Id: Ib122b86ded4bce430773c36fdb5f85bb71100d3d

n0ano/ganttclient