weave: support any taint effect in daemonset tolerations (#6159)

Since weave 2.5.1, `NoExecute` taint effect is no more supported,
this changes the daemonset tolerations to change this behavior.

Also remove the toleration key `CriticalAddonsOnly` not required anymore.

roles/network_plugin/weave/templates/weave-net.yml.j2

@@ -224,11 +224,7 @@ items:
             seLinuxOptions: {}
           serviceAccountName: weave-net
           tolerations:
-            - effect: NoSchedule
+            - operator: Exists
-              operator: Exists
-            # Mark pod as critical for rescheduling (Will have no effect starting with kubernetes 1.12)
-            - key: CriticalAddonsOnly
-              operator: "Exists"
           volumes:
             - name: weavedb
               hostPath: