fix mysql deployment strategy (#1562)

[thesuperzapper]

(cherry picked from commit 6c4f265)

See PR:#1562

[thesuperzapper]

@PatrickXYS can you review?

[PatrickXYS]

/lgtm
/approve

[k8s-ci-robot]

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[PatrickXYS]

===== ACTUAL END ==========================================
  EXPECTED                                                                                 ACTUAL
  --------                                                                                 ------
  apiVersion: apps/v1                                                                      apiVersion: apps/v1
  kind: Deployment                                                                         kind: Deployment
  metadata:                                                                                metadata:
    labels:                                                                                  labels:
      app: katib                                                                               app: katib
      app.kubernetes.io/component: katib                                                       app.kubernetes.io/component: katib
      app.kubernetes.io/name: katib-controller                                                 app.kubernetes.io/name: katib-controller
      component: mysql                                                                         component: mysql
    name: katib-mysql                                                                        name: katib-mysql
    namespace: kubeflow                                                                      namespace: kubeflow
  spec:                                                                                    spec:
    replicas: 1                                                                              replicas: 1
    selector:                                                                                selector:
      matchLabels:                                                                             matchLabels:
        app: katib                                                                               app: katib
        app.kubernetes.io/component: katib                                                       app.kubernetes.io/component: katib
        app.kubernetes.io/name: katib-controller                                                 app.kubernetes.io/name: katib-controller
        component: mysql                                                                         component: mysql
X    template:                                                                                strategy:
X      metadata:                                                                                type: Recreate
X        annotations:                                                                         template:
X          sidecar.istio.io/inject: "false"                                                     metadata:
X        labels:                                                                                  annotations:
X          app: katib                                                                               sidecar.istio.io/inject: "false"
X          app.kubernetes.io/component: katib                                                     labels:
X          app.kubernetes.io/name: katib-controller                                                 app: katib

Unit test failed, can you regenerate tests? @thesuperzapper

[PatrickXYS]

/lgtm