Change to provision file to pick up the vmdk from a shared location if not part of testbed.py. Also added change to pass the deb package as a param than in testbed.py. If param is empty it will look for it in the testbed.

Change-Id: I45bd8aef67b4dc34d9c7527c442bad9fc8a5ed0f
Merge "Change to provision file to pick up the vmdk from a shared location if not part of testbed.py. Also added change to pass the deb package as a param than in testbed.py. If param is empty it will look for it in the testbed."