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

docs/macvlan.md

@@ -0,0 +1,48 @@
+Macvlan
+===============
+
+How to use it :
+-------------
+
+
+* Enable macvlan in `group_vars/k8s-cluster/k8s-cluster.yml`
+```
+...
+kube_network_plugin: macvlan
+...
+```
+
+
+* Adjust the `macvlan_interface` in `group_vars/k8s-cluster/k8s-net-macvlan.yml` or by host in the `host.yml` file: 
+```
+all:
+  hosts:
+    node1:
+      ip: 10.2.2.1
+      access_ip: 10.2.2.1
+      ansible_host: 10.2.2.1
+      macvlan_interface: ens5
+```
+
+
+
+Issue encountered :
+-------------
+
+- Service DNS
+
+reply from unexpected source:
+
+add `kube_proxy_masquerade_all: true` in `group_vars/all/all.yml`
+
+
+- Disable nodelocaldns
+
+The nodelocal dns IP is not reacheable.
+
+Disable it in `sample/group_vars/k8s-cluster/k8s-cluster.yml`
+```
+enable_nodelocaldns: false
+```
+
+