Fix multi images e2e test.

1. Use public images `nginx` and `memcached` to test update for the pod with 2 containers.
We can't use local docker registry for images named `<ip>:<port>/<image_name>:<tag>` because ArgoCD evaluates all images that starts with `<ip>:<port>` as the same images regardless <image_name>.

Signed-off-by: Denis Karpelevich <dkarpele@redhat.com>

Author: dkarpele

test/e2e/README.md

@@ -44,7 +44,3 @@ The end-to-end tests are comprised of the following components:
 ## Run the test suite
 
 1. Run `./e2e-test.sh` to run all the tests located in `./suite`.
-
-## Known issues
-
-1. `./suite/004-multiple-images` is failing now.

test/e2e/containers/git/testdata/004-multi-images-public/deployment.yaml

@@ -0,0 +1,21 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: e2e-registry
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: test-app-001
+      component: argocd-image-updater-e2e
+  template:
+    metadata:
+      labels:
+        app: test-app-001
+        component: argocd-image-updater-e2e
+    spec:
+      containers:
+      - name: test-nginx
+        image: nginx:1.17.0
+      - name: test-memcached
+        image: memcached:1.6.0

test/e2e/containers/git/testdata/004-multi-images-public/kustomization.yaml

@@ -0,0 +1,2 @@
+resources:
+  - deployment.yaml

test/e2e/suite/004-multiple-images/01-install.yaml

@@ -8,15 +8,15 @@ kind: Application
 metadata:
   name: image-updater-004
   annotations:
-    argocd-image-updater.argoproj.io/image-list: test1=10.42.0.1:30000/test-image:1.X.X,test2=10.42.0.1:30000/other-image:1.X.X
+    argocd-image-updater.argoproj.io/image-list: test-nginx=nginx:1.17.10,test-memcached=memcached:1.6.10
     argocd-image-updater.argoproj.io/test.update-strategy: semver
   finalizers:
     - resources-finalizer.argocd.argoproj.io
 spec:
   project: default
   source:
     repoURL: http://10.42.0.1:30002/testdata.git
-    path: ./004-multi-images
+    path: ./004-multi-images-public
     targetRevision: HEAD
   destination:
     server: https://kubernetes.default.svc

test/e2e/suite/004-multiple-images/02-assert.yaml

@@ -6,8 +6,8 @@ spec:
   source:
     kustomize:
       images:
-      - 10.42.0.1:30000/test-image:1.0.2
-      - 10.42.0.1:30000/other-image:1.0.1
+      - nginx:1.17.10
+      - memcached:1.6.10
 status:
   health:
     status: Healthy
@@ -20,5 +20,5 @@ metadata:
   namespace: image-updater-e2e-004
 spec:
   containers:
-  - image: 10.42.0.1:30000/test-image:1.0.2
-  - image: 10.42.0.1:30000/other-image:1.0.1
+  - image: nginx:1.17.10
+  - image: memcached:1.6.10