Fix a typo in configuration description
Fix a typo in configuration description

Change-Id: I5e650459d994e46f3171399348c7d3c1e8258fa6

rahulunair/nova,rahulunair/nova,openstack/nova,openstack/nova,mahak/nova,klmitch/nova,klmitch/nova,klmitch/nova,rahulunair/nova,openstack/nova,mahak/nova,klmitch/nova,mahak/nova