* add initial MetalLB docs
* metallb allow disabling the deployment of the metallb speaker
* calico>=3.18 allow using calico to advertise service loadbalancer IPs
* Document the use of MetalLB and Calico
* clean MetalLB docs
* add nodeselector and tolerations for metallb
* remove unnecessary commented lines in metallb template
* set default speaker toleration to match original manifest
* Make metallb image repos configurable
* Moved metallb image repo definitions to download role defaults
* Removed comment. These are set in download defaults
* Option for MetalLB to talk BGP
* Check for BGP peers when metallb_protocol is bgp
* README clarification
* Commented values as documentation only in the sample inventory
* layer 2 or BGP, not both
This changes MetalLB contrib to one of addons for deploying MetalLB with
Kubernetes cluster deployment. By the default, Kubespray doesn't deploy
MetalLB addon.
