* Add 'flush ip6tables' task in reset role 

If enable_dual_stack_networks is set to true and ip6 is defined，ip6tables will be created. But when reset the kubernetes cluster, kubespray doesn't flush ip6tables.

* [CI] fix molecule tests on opensuse by upgrading to 15.4 (#9175)

* [CI] fix molecule tests on opensuse by upgrading to 15.4

* [opensuse] use correct python crytography package name depending on distribution version

Co-authored-by: Cristian Calin <6627509+cristicalin@users.noreply.github.com>

Signed-off-by: Massimiliano Giovagnoli <me@maxgio.it>

Signed-off-by: Massimiliano Giovagnoli <me@maxgio.it>

* Disable DNSStubListener for Flatcar Linux

* Fix missing "Flatcar" condition of os_family

* Subnet setup order fix & Number of master nodes syntax fix

* Mistake fix!

* Formatting

* Include missing azuredisk rbac manifest

* Remove missing azure csi manifest

* Remove invalid reference mount to waagent settings

* Use cloud-config secret instead of /etc/kubernetes/cloud_config file

* update calico rr

* fix bgppeer conf

* fix yamllint

* fix ansible lint

* fix calico deploy

* fix yamllint

* fix some typo

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>

This condition blocks the creation of the `etcd` user in certain conditions.
Specifically, when you have a `etcd_deployment_type: kubeadm` and `kube_owner: root`.
Being the `root` user already present on the system, this will not be a problem (due to the idempotency of ansible).

* [CI] fix molecule tests on opensuse by upgrading to 15.4

* [opensuse] use correct python crytography package name depending on distribution version

when ingress-nginx is deployes without a class, we need to use 'ingress-controller-leader' resource instead of the default 'ingress-controller-leader-nginx' (#9156)

To check the kube-vip version between readme.md and the default value
on the role, this updates check_readme_versions.sh

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>

https://github.com/cloudnativelabs/kube-router/releases/tag/v1.5.1

Today we have many contributions to contrib/offline/ and some PRs
contained invalid coding style for those scripts.
This enables shellcheck to make such invalid coding style easily.

Signed-off-by: ydFu <ader.ydfu@gmail.com>

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>