Add k8s-ha-calico-flannel-virtlet model.

Change-Id: I75c463d202600547464738dca43aa90a8afaa326
diff --git a/classes/cluster/k8s-ha-calico-flannel-virtlet/MAINTAINERS b/classes/cluster/k8s-ha-calico-flannel-virtlet/MAINTAINERS
new file mode 100644
index 0000000..458882c
--- /dev/null
+++ b/classes/cluster/k8s-ha-calico-flannel-virtlet/MAINTAINERS
@@ -0,0 +1 @@
+Andrey Shestakov <ashestakov@mirantis.com>