Fixes install on CentOS 6.4
Fixes install on CentOS 6.4

/bin/test doesn't exist on CentOS 6.4 (minimal install at least)

/usr/bin/test exists on Fedora, CentOS, RHEL, etc

Change-Id: Ie709bfb592c64c2a637370b9a12c4493a34f3640

imcsk8/packstack,larsks/packstack,alincalinciuc/packstack,openstack/packstack,alincalinciuc/packstack,radez/packstack,spkane/packstack,fr34k8/packstack,pkilambi/packstack,alincalinciuc/packstack,mahak/packstack,weshayutin/packstack,harveyzh/packstack,bcrochet/packstack,bcrochet/packstack,weshayutin/packstack,imcsk8/packstack,spkane/packstack,mahak/packstack,palmer159/openstack-test,bcrochet/packstack,larsks/packstack,palmer159/openstack-test,harveyzh/packstack,xbezdick/packstack,fr34k8/packstack,stackforge/packstack,larsks/packstack,imcsk8/packstack,harveyzh/packstack,pkilambi/packstack,mahak/packstack,xbezdick/packstack,spkane/packstack,stackforge/packstack,openstack/packstack,openstack/packstack,stackforge/packstack,pkilambi/packstack,palmer159/openstack-test,xbezdick/packstack,fr34k8/packstack,weshayutin/packstack,radez/packstack,radez/packstack