K8S-220 update dashboard-beta to 2.0rc1

Author: dfateyev

addons/kubernetes-dashboard-beta.yaml

@@ -193,7 +193,7 @@ spec:
     spec:
       containers:
         - name: kubernetes-dashboard
-          image: kubernetesui/dashboard:v2.0.0-beta8
+          image: kubernetesui/dashboard:v2.0.0-rc1
           imagePullPolicy: Always
           ports:
             - containerPort: 8443

configs/settings.yaml

@@ -54,7 +54,7 @@ fields:
     caption: Kubernetes Dashboard
     values:
       version1: Kubernetes Dashboard v1 (Stable)
-      version2: Kubernetes Dashboard v2 (Beta)
+      version2: Kubernetes Dashboard v2 (RC)
     default: version2
     hideLabel: false
     editable: false