Fixes issue https://github.com/kubernetes-sigs/kubespray/issues/4695

According to [`debug` module documentation](https://docs.ansible.com/ansible/latest/modules/debug_module.html?highlight=msg), the correct parameter name is `msg`.

With the previous `message` parameter name I was getting FAILED messages while ansible was trying to debug previous FAILED tasks.

* Add support for http(s)_proxy to CoreOS and Fedora

* fix opensuse proxy support

* Fix CoreOS proxy support

* update documentation

This change ensures that etcd_extra_vars variable applies
to events etcd as well.

* Download to delegate and sync files when download_run_once

* Fail on error after saving container image

* Do not set changed status when downloaded container was up to date

* Only sync containers when they are actually required

Previously, non-required images (pull_required=false as
image existed on target host) were synced to the target
hosts. This failed as the image was not downloaded to
the download_delegate and hence was not available for
syncing.

* Sync containers when only missing on some hosts

* Consider images with multiple repo tags

* Enable kubeadm images pull/syncing with download_delegate

* Use kubeadm images list to pull/sync

'kubeadm config images pull' is replaced by collecting the images
list with 'kubeadm config images list' and using the commonly
used method of pull/syncing the images.

* Ensure containers are downloaded and synced for all hosts

* Fix download/syncing when download_delegate is a kubernetes host

Add etcd role dependency on kube user to avoid etcd role failure when running scale.yml with a fresh node. (#3240) (#4479)

Change-Id: I1588458b54c52443ad8d0afbd266f77ac0afea67

* Run dns_late preinstall tasks on all k8s nodes

Related issue: #4656

Change-Id: I63f8559ef1a497b7580ab084561e6603fe647834

* Fix ansible-lint

Change-Id: Ia5b33fa63dbc36d8c3e9557ef3f2ea02af2325a5

* Fix recover_control_plane lint issues

Change-Id: I16643a3193c11b6ba704e9698812cac7e4fd19a8

Close #4113

When docker_container_storage_setup is false,
docker service should not depend on docker-storage-setup service,
because it's not installed.

For example, when using overlay2 on recent RHEL 7/Centos 7 kernels,
you most likely don't need it.

* Fix nodeselectors for contiv and nginx-ingress

Change-Id: Ib3eb6bd87193c69a90ee944c9164a0b6792c79ba

* Set kube proxy mode to iptables for addons task

Change-Id: Iff71a71f672405c74b4708c71db15ddc4391a53a

* kube-apiserver will fail if used comma as separator

* Fix kubeadm upload certs with when condition

Change-Id: I916dd2375b71eea2386047c7f185a2f8361f7a61

* Update kubeadm-secondary-experimental.yml

* Fix metrics-server deployment

* Make metrics server work

* Fix sample inventory

* Add support calico kubernetes datastore and typha.

* Add typha_enabled to kubespray-defaults.

Use host_architecture variable.

Change-Id: I71dc793641bc168e40419e38f33f68f5325e77a9

Change-Id: I2c97c4753089eb3ec2e6b01b2681a8be98ecbb57

* Pass ansible_ssh_user as host_var

Co-authored-by: Damian Darczuk <damian.darczuk@intel.com>
Co-authored-by: Paweł Pałucki <pawel.palucki@intel.com>

* Create a directory before downloading container images to ansible host

Co-authored-by: Damian Darczuk <damian.darczuk@intel.com>
Co-authored-by: Paweł Pałucki <pawel.palucki@intel.com>

* Set private key usuing synchronize task options

Co-authored-by: Damian Darczuk <damian.darczuk@intel.com>
Co-authored-by: Paweł Pałucki <pawel.palucki@intel.com>

add the support of the folling property in azure-credential-check.yml
  - azure_loadbalancer_sku: Sku of Load Balancer and Public IP. Candidate values are: basic and standard.
  - azure_exclude_master_from_standard_lb: excludes master nodes from standard load balancer.
  - azure_disable_outbound_snat: disables the outbound SNAT for public load balancer rules
  - useInstanceMetadata: Use instance metadata service where possible
  - azure_primary_availability_set: (Optional) The name of the availability set that should be used as the load balancer backend

We don't need to support upgrades from 2 year old installs,
just from the last major version.

Also changed most retried tasks to 1s delay instead of longer.

As of kubernetes v1.14, docker 18.09 is [validated for use](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.14.md#external-dependencies). Docker 1.11 and 1.12 were dropped.

This patch:
- Updates the default docker version to 18.09
- Updates Docker packages to the latest 18.09 patch (18.09.5)
- Removes options for Docker 1.11 and 1.12

Circumvented one false positive from ansible-lint
Moved a block of jinja magic into its own variable

* Add README to bootstrap-os role

* Rework bootstrap-os once more

* Document workarounds for bugs/deficiencies in Ansible modules
* Unify and document role variables
* Remove installation of additional packages and repositories
* Merge Ubuntu and Debian tasks
* Remove pipelining setting from default playbooks
* Fix OpenSUSE not running its required tasks

* Fix merge conflict

* Add check delay

* Add more liveness and readiness options to metrics-server

* disable metrics server in centos7-flannel-addons job

Change-Id: I1d87923547584896f64dda9ea8feb5581ad48cbe

* Fix tf facility->facilities syntax

Change-Id: I434bfe53f47e8e4a546890e0b62d24bde6e6d6a7

* Update Terraform CI for facilities

* Fix undefined variable error

This reverts commit f8fdc0cd.