Fixing address locking in CP fake.

Follow on to https://github.com/kubernetes/kubernetes/pull/65226.

pkg/cloudprovider/providers/fake/fake.go

@@ -228,6 +228,8 @@ func (f *FakeCloud) SetNodeAddresses(nodeAddresses []v1.NodeAddress) {
 // It adds an entry "node-addresses-by-provider-id" into the internal method call record.
 func (f *FakeCloud) NodeAddressesByProviderID(ctx context.Context, providerID string) ([]v1.NodeAddress, error) {
 	f.addCall("node-addresses-by-provider-id")
+	f.addressesMux.Lock()
+	defer f.addressesMux.Unlock()
 	return f.Addresses, f.Err
 }