Description of problem:
The kibana wasn't be scaled up after the replicas number are changed.

Version-Release number of selected component (if applicable):
4.5 origin

How reproducible:
Akways

Steps to Reproduce:
1. Deploy cluserlogging with kibana replicas number=1 in clusterlogging CR
apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"
  namespace: openshift-logging
spec:
  managementState: "Managed"
  logStore:
    type: "elasticsearch"
    elasticsearch:
      nodeCount: 1
      resources:
        limits:
          memory: 2Gi
        requests:
          cpu: 200m
          memory: 2Gi
      storage: {}
      redundancyPolicy: "ZeroRedundancy"
  visualization:
    type: "kibana"
    kibana:
      replicas: 1
  curation:
    type: "curator"
    curator:
      schedule: "*/10 * * * *"
  collection:
    logs:
      type: "fluentd"
      fluentd: {}

2. Modify kibana replicas numbe=2
apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"
  namespace: openshift-logging
spec:
  <---snip --- >
  visualization:
    type: "kibana"
    kibana:
      replicas: 2
  <---snip---->

Actual results:
The replicas number =2 in kibana CR. But replicas number still 1 in the deployment kibana


Expected results:
There are two kibana pods.

Additional info:
Workaround: delete the kibana deployment. you can get two kibana pods