Update to controller-runtime 0.7.0

controller-runtime methods now accept `client.Object` and
`client.ObjectList` rather than `runtime.Object`. This means the
adapter interfaces need to change signature, but happily, little else.

Since the list adapter is now distinct to the object adapter, `len()`
can go there instead of the command-specific interfaces.

Signed-off-by: Michael Bridgen <michael@weave.works>

cmd/flux/get.go

@@ -45,8 +45,7 @@ func init() {
 }
 
 type summarisable interface {
-	adapter
-	len() int
+	listAdapter
 	summariseItem(i int, includeNamespace bool) []string
 	headers(includeNamespace bool) []string
 }
@@ -87,7 +86,7 @@ func (get getCommand) run(cmd *cobra.Command, args []string) error {
 	if !allNamespaces {
 		listOpts = append(listOpts, client.InNamespace(namespace))
 	}
-	err = kubeClient.List(ctx, get.list.asRuntimeObject(), listOpts...)
+	err = kubeClient.List(ctx, get.list.asRuntimeList(), listOpts...)
 	if err != nil {
 		return err
 	}