Adds integration test for apply failures when applying multiple resources

hack/testdata/multi-resource.yaml

@@ -0,0 +1,19 @@
+# Tests that initial failures to not block subsequent applies.
+# Pod must be before namespace, so it initially fails. Second
+# apply of pod should succeed, since namespace finally exists.
+apiVersion: v1
+kind: Pod
+metadata:
+  name: test-pod
+  namespace: multi-resource-ns
+  labels:
+    name: test-pod-label
+spec:
+  containers:
+  - name: kubernetes-pause
+    image: k8s.gcr.io/pause:2.0
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: multi-resource-ns