Makefile, e2e/*: Add end to end tests

Tests are using kind, adjacency and bash_unit.

A kind cluster is spun up and the previously build container image of
Kilo is loaded into it.
Adjacency and a curl container is started.

From the curl container a http request is send to the adjacency service.

The test fails if curl returns an unexpected result.

Two test are run. One with `mesh-granularity=full` and `location`.

The e2e test is only run for pull request because it is a bit flaky for
automatic nightly runs.

Signed-off-by: leonnicolas <leonloechner@gmx.de>

e2e/helper-curl.yaml

@@ -0,0 +1,26 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  annotations:
+  labels:
+    app.kubernetes.io/name: curl
+  name: curl
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: curl
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app.kubernetes.io/name: curl
+    spec:
+      containers:
+      - command:
+        - /bin/sh
+        - -c
+        - while [ 1 -eq 1 ] ; do sleep 10; done
+        image: curlimages/curl
+        name: curl
+      restartPolicy: Always