k8sT/Services: Fix URL for bookinfo tests
k8sT/Services: Fix URL for bookinfo tests

The ratings service never seemed to serve anything other than a 404 on
the "/" path. Fix it so that we are attempting to reach paths that serve
a real page.

Fixes: #4042

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@covalent.io>

tgraf/cilium,scanf/cilium,eloycoto/cilium,eloycoto/cilium,eloycoto/cilium,scanf/cilium,cilium/cilium,tklauser/cilium,cilium/cilium,cilium-team/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,scanf/cilium,cilium/cilium,eloycoto/cilium,eloycoto/cilium,cilium-team/cilium,michi-covalent/cilium,eloycoto/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,eloycoto/cilium,michi-covalent/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,scanf/cilium,scanf/cilium,tklauser/cilium,scanf/cilium,scanf/cilium,tgraf/cilium,tklauser/cilium,michi-covalent/cilium