CI: use images from quay.io to prevent being throttled by docker hub (#8209)

* CI: use netchecker images from quay to prevent throttling

* Molecule: use hello-world image from quay.io

roles/container-engine/kata-containers/molecule/default/files/container.json

@@ -3,7 +3,7 @@
     "name": "kata1"
   },
   "image": {
-    "image": "docker.io/library/hello-world:latest"
+    "image": "quay.io/kubespray/hello-world:latest"
   },
   "log_path": "kata1.0.log",
   "linux": {}

roles/container-engine/kata-containers/molecule/default/tests/test_default.py

@@ -34,4 +34,4 @@ def test_run_pod(host):
       log_f = host.file("/tmp/kata1.0.log")
 
       assert log_f.exists
-      assert b"Hello from Docker!" in log_f.content
+      assert b"Hello from Docker" in log_f.content