Update ACK runtime to v0.16.4 (#79)

### Update ACK runtime to `v0.16.4`

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* ACK code-generator `v0.16.4` [release notes](https://github.com/aws-controllers-k8s/code-generator/releases/tag/v0.16.4)
* ACK runtime `v0.16.4` [release notes](https://github.com/aws-controllers-k8s/runtime/releases/tag/v0.16.4)

----------

NOTE:
This PR increments the release version of service controller from `v0.0.11` to `v0.0.12`

Once this PR is merged, release `v0.0.12` will be automatically created for `elasticache-controller`

**Please close this PR, if you do not want the new patch release for `elasticache-controller`**

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#### stdout for `make build-controller`:

```
building ack-generate ... ok.
==== building elasticache-controller ====
Copying common custom resource definitions into elasticache
Building Kubernetes API objects for elasticache
Generating deepcopy code for elasticache
Generating custom resource definitions for elasticache
Building service controller for elasticache
Generating RBAC manifests for elasticache
Running gofmt against generated code for elasticache
Updating additional GitHub repository maintenance files
==== building elasticache-controller release artifacts ====
Building release artifacts for elasticache-v0.0.12
Generating common custom resource definitions
Generating custom resource definitions for elasticache
Generating RBAC manifests for elasticache
```

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: ack-bot

apis/v1alpha1/ack-generate-metadata.yaml

@@ -1,11 +1,11 @@
 ack_generate_info:
-  build_date: "2022-01-24T20:34:25Z"
-  build_hash: cccec82a27ddd880095383360df1fdc8f530842f
+  build_date: "2022-02-02T21:33:24Z"
+  build_hash: 8f02d7700eaa65a51e99c37d296056def0b70647
   go_version: go1.17.5
-  version: v0.16.3
-api_directory_checksum: 225442ca880d4df705d9b73f8711f2143a3db4b0
+  version: v0.16.4
+api_directory_checksum: bef5d547b18c317b14122df45cf63430cc32264b
 api_version: v1alpha1
-aws_sdk_go_version: v1.38.52
+aws_sdk_go_version: v1.42.0
 generator_config_info:
   file_checksum: 23f444fb86eaa5c1acb4d4f51430e606e7ee554a
   original_file_name: generator.yaml

apis/v1alpha1/replication_group.go

@@ -61,6 +61,7 @@ spec:
             drop:
               - ALL
       terminationGracePeriodSeconds: 10
+      serviceAccountName: ack-elasticache-controller
       hostIPC: false
       hostNetwork: false
       hostPID: false

apis/v1alpha1/types.go

@@ -5,5 +5,5 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 images:
 - name: controller
-  newName: ack-elasticache-controller
-  newTag: latest
+  newName: public.ecr.aws/aws-controllers-k8s/elasticache-controller
+  newTag: v0.0.12

apis/v1alpha1/user_group.go

@@ -704,6 +704,10 @@ spec:
                         type: array
                     type: object
                 type: object
+              replicationGroupCreateTime:
+                description: The date and time when the cluster was created.
+                format: date-time
+                type: string
               snapshottingClusterID:
                 description: The cluster ID that is used as the daily snapshot source
                   for the replication group.

apis/v1alpha1/zz_generated.deepcopy.go

@@ -129,7 +129,7 @@ spec:
                   type: object
                 type: array
               pendingChanges:
-                description: A list of updates being applied to the user groups.
+                description: A list of updates being applied to the user group.
                 properties:
                   userIDsToAdd:
                     items:

config/controller/deployment.yaml

@@ -8,5 +8,5 @@ roleRef:
   name: ack-elasticache-controller
 subjects:
 - kind: ServiceAccount
-  name: default
+  name: ack-elasticache-controller
   namespace: ack-system