Fix a typo in driver.py
Fix a typo in driver.py

TrivialFix

Change-Id: I0dcf6233628f42fce4a18e84d3b8f66013fbeeea

jianghuaw/nova,klmitch/nova,openstack/nova,rahulunair/nova,mahak/nova,phenoxim/nova,vmturbo/nova,jianghuaw/nova,gooddata/openstack-nova,Juniper/nova,vmturbo/nova,sebrandon1/nova,Juniper/nova,klmitch/nova,gooddata/openstack-nova,mikalstill/nova,phenoxim/nova,rajalokan/nova,Juniper/nova,gooddata/openstack-nova,sebrandon1/nova,openstack/nova,vmturbo/nova,jianghuaw/nova,openstack/nova,gooddata/openstack-nova,rajalokan/nova,sebrandon1/nova,mikalstill/nova,klmitch/nova,klmitch/nova,vmturbo/nova,Juniper/nova,rajalokan/nova,rahulunair/nova,hanlind/nova,jianghuaw/nova,mikalstill/nova,rajalokan/nova,hanlind/nova,rahulunair/nova,mahak/nova,hanlind/nova,mahak/nova