* bump crio version to 1.19

* crio package name has changed for debian/ubuntu
* crio upgrade does not work, see #6757

* update crio info in docs

After host reboot kubelet and crio goes into a loop and no container is started.

storage_driver in crio.conf overrides system defaults in etc/containers/storage.conf

/etc/containers/storage.conf is installed by package containers-common dependency
installed from cri-o (centos7) and contains "overlay".

Hosts already configured with overlay2 should be reconfigured and the
/var/lib/containers content removed.

By default do not allow "unqualified" (without a registry) images
because it is considered unsecure and subject to mitm attacks.

To enable insecure pull configure for example:

crio_registries:
  - "docker.io"
  - "quay.io"

* log level by default increased to 'info'
* cgroup manager by default set to 'systemd'
* stream port (used by kubelet) bound to 127.0.0.1 for security reasons
* metrics can be enabled and port specified

* replace removed repo with kubic repository for centos 7

* add crio configuration for centos8

* add crio configurations for debian

* use correct crio version for fedora

* simplify calulation of required crio version
- gives possibility to overwrite

* change default path for runc

* change default for seccomp path

* change default for conmon

* declare kubic repo for ubuntu

* do not install crictl twice

* move fedora repo modular tasks to crio_repo file

* move centos repo tasks to crio_repo

* declare crio version matrix for ubuntu

* update documentation crio support for ubuntu

* fix upgrade of crio on fcos
- update documents

* install conntrack required by kube-proxy
- like commit 48c41bcb

* enable fedora modular repo for crio

* allow to override crio configuration
- set cgroup manager same to kubelet_cgroup_driver if defined
- path of seccomp_profile depends on distribution

* allow to override crio configuration
- fix path for ubuntu

* allow to override crio configuration
- fix cni path for fcos

According to their compatibility matrix[1] the 1.11.5 version seems to
be deprecated. This change updates the CentOS repository reference.

[1] https://github.com/cri-o/cri-o#compatibility-matrix-cri-o---kubernetes-clusters

* Fix bootstrap_os/ubuntu idempotency

* Update bastion role

* move container_engine in sub-roles

* requires ansible 2.5

* ubuntu18 as first CI job