Fix typo in install_rally.sh script
Fix typo in install_rally.sh script

Change-Id: Ic68a59abb4e03f9f1b4c1958fd42df2de425183a

openstack/rally,eayunstack/rally,vganapath/rally,gluke77/rally,eonpatapon/rally,vganapath/rally,gluke77/rally,openstack/rally,vganapath/rally,openstack/rally,yeming233/rally,gluke77/rally,eonpatapon/rally,openstack/rally,vganapath/rally,yeming233/rally,eayunstack/rally,eayunstack/rally,gluke77/rally