after reverting boot arg in DiskMount constructor to default to False, caller must specify boot=True, when boot PD is desired.
after reverting boot arg in DiskMount constructor to default to False,
caller must specify boot=True, when boot PD is desired.

gdgjodhpur/compute-appengine-demo-suite-python,googlearchive/compute-appengine-demo-suite-python,gdgjodhpur/compute-appengine-demo-suite-python,jonparrott/compute-appengine-demo-suite-python,googlearchive/compute-appengine-demo-suite-python,gdgjodhpur/compute-appengine-demo-suite-python,jonparrott/compute-appengine-demo-suite-python,googlearchive/compute-appengine-demo-suite-python,jonparrott/compute-appengine-demo-suite-python,googlearchive/compute-appengine-demo-suite-python,jonparrott/compute-appengine-demo-suite-python,gdgjodhpur/compute-appengine-demo-suite-python,googlearchive/compute-appengine-demo-suite-python,jonparrott/compute-appengine-demo-suite-python,gdgjodhpur/compute-appengine-demo-suite-python