Add toleration for calico-typha on master (#5405)

Change-Id: Iea9a366cf6ccc4d491bfc49c5d2dba6d98f81b69

roles/network_plugin/calico/templates/calico-typha.yml.j2

@@ -45,19 +45,15 @@ spec:
       labels:
         k8s-app: calico-typha
       annotations:
-        # This, along with the CriticalAddonsOnly toleration below, marks the pod as a critical
-        # add-on, ensuring it gets priority scheduling and that its resources are reserved
-        # if it ever gets evicted.
-        scheduler.alpha.kubernetes.io/critical-pod: ''
         cluster-autoscaler.kubernetes.io/safe-to-evict: 'true'
     spec:
       nodeSelector:
         beta.kubernetes.io/os: linux
       hostNetwork: true
       tolerations:
-        # Mark the pod as a critical add-on for rescheduling.
-        - key: CriticalAddonsOnly
+        - key: node-role.kubernetes.io/master
           operator: Exists
+          effect: NoSchedule
       # Since Calico can't network a pod until Typha is up, we need to run Typha itself
       # as a host-networked pod.
       serviceAccountName: calico-node