Make test.integration.*.kube/local output junit reports. (#14755)
Make test.integration.*.kube/local output junit reports. (#14755)

These targets are used by postsubmits. Without junit reports, testgrid
cannot display individual test case failures.
smawson/istio,geeknoid/istio,istio/istio,istio/istio,smawson/istio,geeknoid/istio,geeknoid/istio,istio/istio,istio/istio,smawson/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio