* [ansible] make ansible 5.x the new default version and move different versions tested to nightly jobs
* [CI] jobs were missing proper ansible cleanup
* [calico] make vxlan encapsulation the default
* don't enable ipip encapsulation by default
* set calico_network_backend by default to vxlan
* update sample inventory and documentation
* [CI] pin default calico parameters for upgrade tests to ensure proper upgrade
* [CI] improve netchecker connectivity testing
* [CI] show logs for tests
* [calico] tweak task name
* [CI] Don't run the provisioner from vagrant since we run it in testcases_run.sh
* [CI] move kube-router tests to vagrant to avoid network connectivity issues during netchecker check
* service proxy mode still fails connectivity tests so keeping it manual mode
* [kube-router] account for containerd use-case
* Ansible: move to Ansible 3.4.0 which uses ansible-base 2.10.10
* Docs: add a note about ansible upgrade post 2.9.x
* CI: ensure ansible is removed before ansible 3.x is installed to avoid pip failures
* Ansible: use newer ansible-lint
* Fix ansible-lint 5.0.11 found issues
* syntax issues
* risky-file-permissions
* var-naming
* role-name
* molecule tests
* Mitogen: use 0.3.0rc1 which adds support for ansible 2.10+
* Pin ansible-base to 2.10.11 to get package fix on RHEL8
