Fix RoleBinding and namespace in samples

Makefile

@@ -63,7 +63,10 @@ kind-cluster-create: kind ## Create a kind cluster for development
 	@if [ -z $(shell $(KIND) get clusters | grep $(KIND_CLUSTER_NAME)) ]; then \
 	  $(KIND) create cluster --name $(KIND_CLUSTER_NAME); \
 	fi
+	## Change context to use kind cluster as default
 	kubectl config use-context kind-$(KIND_CLUSTER_NAME)
+	## Install cert-manager for generating certifacetes for validation and defaulting webhooks
+	kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.6.1/cert-manager.yaml
 
 kind-cluster-delete: kind ## Delete the kind cluster created for development
 	@$(KIND) delete cluster --name $(KIND_CLUSTER_NAME)

config/samples/rbac/role.yaml

@@ -18,7 +18,7 @@ metadata:
   namespace: test
 roleRef:
   apiGroup: rbac.authorization.k8s.io
-  kind: ClusterRole
+  kind: Role
   name: spanner-autoscaller-secret-reader
 subjects:
   - kind: ServiceAccount

config/samples/spanner_v1beta1_spannerautoscaler.yaml

@@ -2,6 +2,7 @@ apiVersion: spanner.mercari.com/v1beta1
 kind: SpannerAutoscaler
 metadata:
   name: spannerautoscaler-sample-beta
+  namespace: test
 spec:
   targetInstance:
     projectId: beta-project

config/samples/spanner_v1beta1_spannerautoscaleschedule.yaml

@@ -2,6 +2,7 @@ apiVersion: spanner.mercari.com/v1beta1
 kind: SpannerAutoscaleSchedule
 metadata:
   name: spannerautoscaleschedule-sample
+  namespace: test
 spec:
   targetResource: spannerautoscaler-sample-beta
   additionalProcessingUnits: 300