add macvlan cni to kubespray (#4901)

* add macvlan cni to kubespray

* macvlan: lint yaml files and fix sample config file

* macvlan: add OWNERS file

* add macvlan to README

* macvlan : CI first shoot

* macvlan : CI add full masquerade

* delegate retrive pod cidr to master only

* macvlan: add config for CI

* macvlan: add netchecker deployment

roles/network_plugin/macvlan/templates/10-macvlan.conf.j2

@@ -0,0 +1,15 @@
+{
+  "cniVersion": "0.3.0",
+  "name": "mynet",
+  "type": "macvlan",
+  "master": "{{ macvlan_interface }}",
+  "hairpinMode": true,
+  "ipam": {
+    "type": "host-local",
+    "subnet": "{{ node_pod_cidr }}",
+    "routes": [
+      { "dst": "0.0.0.0/0" }
+    ],
+    "gateway": "{{ node_pod_cidr|ipaddr('net')|ipaddr(1)|ipaddr('address') }}"
+  }
+}