Fix simple typo mistake
Fix simple typo mistake

Change-Id: I0cd4752beecf16a920367a085acf4701fdc8d998

yeming233/rally,openstack/rally,vganapath/rally,openstack/rally,gluke77/rally,vganapath/rally,yeming233/rally,openstack/rally,openstack/rally,vganapath/rally,gluke77/rally,gluke77/rally,gluke77/rally,vganapath/rally