packaging: engine-setup - Replace hardcoded ovirt string
packaging: engine-setup - Replace hardcoded ovirt string

Replace hardcoded ovirt string with variable

Change-Id: I767cf4dd2bca3bbf38a1a68601fdda31ea2873e6
Signed-off-by: Kiril Nesenko <c377644256f2520ee68af386b25c50ac247ee8aa@redhat.com>

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