[DOC BLD FIX] Fix formatting error in driver.py
[DOC BLD FIX] Fix formatting error in driver.py

There were formatting errors causing sphinx to throw
a WARNING when processing the doc string in driver.py.

This patch updates those formatting errors so they do
not cause a WARNING to be thrown.

Change-Id: Ib40fc7f0927e175079f97583663510627342d767

mahak/cinder,phenoxim/cinder,Datera/cinder,j-griffith/cinder,eharney/cinder,openstack/cinder,j-griffith/cinder,eharney/cinder,mahak/cinder,phenoxim/cinder,Datera/cinder,openstack/cinder