kube: clean up SimpleIngress

Rename `target_service` to `target` to mirror Service's `target`; rename `extra_paths` to `extraPaths` to follow the camelCase convention used everywhere except for a few places in kube.upstream (assumed to be a mistake)

Change-Id: Icfcb70ef889e3359bf0391c465034817f4b70cce
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1809
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/bgpwtf/cccampix/kube/ix.libsonnet b/bgpwtf/cccampix/kube/ix.libsonnet
index a503941..fdc6e25 100644
--- a/bgpwtf/cccampix/kube/ix.libsonnet
+++ b/bgpwtf/cccampix/kube/ix.libsonnet
@@ -421,19 +421,19 @@
 
         ingress: kube.SimpleIngress("ingress") {
             hosts:: [cfg.frontend.domain],
-            target_service:: ix.frontend.svc,
+            target:: ix.frontend.svc,
             metadata+: ix.metadata("public"),
         },
 
         aliceIngress: kube.SimpleIngress("alice") {
             hosts:: [cfg.alice.domain],
-            target_service:: ix.alice.svc,
+            target:: ix.alice.svc,
             metadata+: ix.metadata("alice"),
         },
 
         grpcIngress: kube.SimpleIngress("grpc") {
             hosts:: [cfg.verifier.domain],
-            target_service:: ix.verifier.svc,
+            target:: ix.verifier.svc,
             metadata+: ix.metadata("alice") {
                 annotations+: {
                     "kubernetes.io/ingress.class": "nginx",