Fix issue #7129. Calico image tags support multiarch on quay.io.

* SHAs for 1.19.6, 1.18.14, 1.18.13, 1.17.16 and 1.17.15

* Fix etcd version in README

* Bump kube_version to 1.19.6

* Update hashes and set default version to 1.19.5

Signed-off-by: anthr76 <hello@anthonyrabbito.com>

* Reorder hashes

1.19.5 hashes should be near 1.19.x

* Added back blank line

* Fix etcd download dest

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* Only support Helm v3, cleanup install

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

This new version uses the same base image as kube-proxy
(k8s.gcr.io/build-image/debian-iptables)
This allow to automatically pick iptables-legacy or iptables-nft,
and be compatible with RHEL/CentOS 8
https://github.com/kubernetes/dns/pull/367



Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* fix flake8 errors in Kubespray CI - tox-inventory-builder

* Invalidate CRI-O kubic repo's cache

Signed-off-by: Victor Morales <v.morales@samsung.com>

* add support to configure pkg install retries

and use in CI job tf-ovh_ubuntu18-calico (due to it failing often)

* Switch Calico, Cilium and MetalLB image repos to Quay.io

Co-authored-by: Victor Morales <v.morales@samsung.com>
Co-authored-by: Barry Melbourne <9964974+bmelbourne@users.noreply.github.com>

Added Comment line above checksum section to add clarification about Kubespray's version support and testing (#6785)

The 0d0cc8cf change creates several
DaemonSets to cover the Flannel CNI installation for different CPU
architectures. This change removes the unnecessary architecture value
from the docker tag value.

Signed-off-by: Victor Morales <v.morales@samsung.com>

* calico: add constant calico_min_version_required

and verify current deployed version against it.

* calico: remove upgrade support with data migration

The tool was used pre v3.0.0 and is no longer needed.

* calico: remove old version support from tasks

* calico: remove old ver support from policy ctrl

* calico: remove old ver support from node

* canal: remove old ver support

* remove unused calicoctl download checksums

calico_min_version_required is the oldest version that can be installed
Older versions can be removed.

* Make metallb image repos configurable

* Moved metallb image repo definitions to download role defaults

* Removed comment. These are set in download defaults