Merge pull request #54128 from jianglingxia/jlx-changelog

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

fix some  brackets and N/A in CHANGELOG-1.8

**What this PR does / why we need it**:
in CHANGELOG-1.8 Cluster Lifecycle and OpenStack place have redundant brackets 
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

CHANGELOG-1.8.md

@@ -600,7 +600,7 @@ This section provides an overview of deprecated API versions, options, flags, an
 
   - Enable an out-of-tree cloud provider with `--cloud-provider=external` in either version.
 
-    For more information on deprecating auto-detecting cloud providers in kubelet, see [PR [#51312](https://github.com/kubernetes/kubernetes/pull/51312) and [announcement](https://groups.google.com/forum/#!topic/kubernetes-dev/UAxwa2inbTA).
+    For more information on deprecating auto-detecting cloud providers in kubelet, see PR [#51312](https://github.com/kubernetes/kubernetes/pull/51312) and [announcement](https://groups.google.com/forum/#!topic/kubernetes-dev/UAxwa2inbTA).
 
 - The `PersistentVolumeLabel` admission controller in the API server is deprecated.
 
@@ -613,7 +613,7 @@ This section provides an overview of deprecated API versions, options, flags, an
 ### OpenStack
 
 - The `openstack-heat` provider for `kube-up` is deprecated and will be removed
-  in a future release. Refer to [Issue [#49213](https://github.com/kubernetes/kubernetes/issues/49213)
+  in a future release. Refer to Issue [#49213](https://github.com/kubernetes/kubernetes/issues/49213)
   for background information.
 
 ### Scheduling
@@ -1180,7 +1180,6 @@ filename | sha256 hash
 * kubeadm: Use the release-1.8 branch by default ([#52085](https://github.com/kubernetes/kubernetes/pull/52085), [@luxas](https://github.com/luxas))
 * PersistentVolumeLabel admission controller is now deprecated. ([#52618](https://github.com/kubernetes/kubernetes/pull/52618), [@dims](https://github.com/dims))
 * Mark the LBaaS v1 of OpenStack cloud provider deprecated. ([#52821](https://github.com/kubernetes/kubernetes/pull/52821), [@FengyunPan](https://github.com/FengyunPan))
-* NONE ([#52819](https://github.com/kubernetes/kubernetes/pull/52819), [@verult](https://github.com/verult))
 * Mark image as deliberately optional in v1 Container struct.  Many objects in the Kubernetes API inherit the container struct and only Pods require the field to be set. ([#48406](https://github.com/kubernetes/kubernetes/pull/48406), [@gyliu513](https://github.com/gyliu513))
 * [fluentd-gcp addon] Update Stackdriver plugin to version 0.6.7 ([#52565](https://github.com/kubernetes/kubernetes/pull/52565), [@crassirostris](https://github.com/crassirostris))
 * Remove duplicate proto errors in kubelet. ([#52132](https://github.com/kubernetes/kubernetes/pull/52132), [@adityadani](https://github.com/adityadani))
@@ -1219,7 +1218,6 @@ filename | sha256 hash
 * The `kube-cloud-controller-manager` flag `--service-account-private-key-file` was non-functional and is now deprecated. ([#50289](https://github.com/kubernetes/kubernetes/pull/50289), [@liggitt](https://github.com/liggitt))
     * The `kube-cloud-controller-manager` flag `--use-service-account-credentials` is now honored consistently, regardless of whether `--service-account-private-key-file` was specified.
 * Fix credentials providers for docker sandbox image. ([#51870](https://github.com/kubernetes/kubernetes/pull/51870), [@feiskyer](https://github.com/feiskyer))
-* NONE ([#52120](https://github.com/kubernetes/kubernetes/pull/52120), [@abgworrall](https://github.com/abgworrall))
 * Fixed an issue looking up cronjobs when they existed in more than one API version ([#52227](https://github.com/kubernetes/kubernetes/pull/52227), [@liggitt](https://github.com/liggitt))
 * Add priority-based preemption to the scheduler. ([#50949](https://github.com/kubernetes/kubernetes/pull/50949), [@bsalamat](https://github.com/bsalamat))
 * Add CLUSTER_SIGNING_DURATION environment variable to cluster configuration scripts ([#51844](https://github.com/kubernetes/kubernetes/pull/51844), [@jcbsmpsn](https://github.com/jcbsmpsn))
@@ -1566,7 +1564,6 @@ filename | sha256 hash
 * Make rolling update the default update strategy for v1beta2.DaemonSet and v1beta2.StatefulSet ([#50175](https://github.com/kubernetes/kubernetes/pull/50175), [@foxish](https://github.com/foxish))
 * Deprecate Deployment .spec.rollbackTo field  ([#49340](https://github.com/kubernetes/kubernetes/pull/49340), [@janetkuo](https://github.com/janetkuo))
 * Collect metrics from Heapster in Stackdriver mode. ([#50290](https://github.com/kubernetes/kubernetes/pull/50290), [@piosz](https://github.com/piosz))
-* N/A ([#50179](https://github.com/kubernetes/kubernetes/pull/50179), [@k82cn](https://github.com/k82cn))
 * [Federation] HPA controller ([#45993](https://github.com/kubernetes/kubernetes/pull/45993), [@irfanurrehman](https://github.com/irfanurrehman))
 * Relax restrictions on environment variable names. ([#48986](https://github.com/kubernetes/kubernetes/pull/48986), [@timoreimann](https://github.com/timoreimann))
 * The node condition 'NodeInodePressure' was removed, as kubelet did not report it. ([#50124](https://github.com/kubernetes/kubernetes/pull/50124), [@k82cn](https://github.com/k82cn))