allow users to set image_uuid instead of name, this allows the use of openstack community images (#7283)

* [terraform/aws] Fix Terraform >=0.13 warnings

Terraform >=0.13 gives the following warning:

```
Warning: Interpolation-only expressions are deprecated
```

The fix was tested as follows:
```
rm -rf .terraform && terraform0.12.26 init && terraform0.12.26 validate
rm -rf .terraform && terraform0.13.5 init && terraform0.13.5 validate
rm -rf .terraform && terraform0.14.3 init && terraform0.14.3 validate
```
which gave no errors nor warnings.

* [terraform/openstack] Fixes for Terraform >=0.13

Terraform >=0.13 gives the following error:
```
Error: Failed to install providers
Could not find required providers, but found possible alternatives:
  hashicorp/openstack -> terraform-provider-openstack/openstack
```

This patch fixes these errors.

This fix was tested as follows:
```
rm -rf .terraform && terraform0.12.26 init && terraform0.12.26 validate
rm -rf .terraform && terraform0.13.5 init && terraform0.13.5 validate
rm -rf .terraform && terraform0.14.3 init && terraform0.14.3 validate
```
which gave no errors nor warnings for Terraform 0.13.5 and Terraform
0.14.3. Unfortunately, 0.12.x gives a harmless warning, but
with 0.14.3 out the door, I guess we need to move on.

* [terraform/packet] Fixes for Terraform >=0.13

This fix was tested as follows:
```
export PACKET_AUTH_TOKEN=blah-blah
rm -rf .terraform && terraform0.12.26 init && terraform0.12.26 validate
rm -rf .terraform && terraform0.13.5 init && terraform0.13.5 validate
rm -rf .terraform && terraform0.14.3 init && terraform0.14.3 validate
```

Errors are gone, but warnings still remain. It is impossible to please
all three versions of Terraform.

* Add tests for Terraform >=0.13

* add custom sec groups

* make sure groups are applied only when created

* fix spacing

k8s_master_no_etcd_fips should not be input var

* Terraform/OpenStack: Allow free form worker node definition

* fixup! Terraform/OpenStack: Allow free form worker node definition

* rebase and add az_list_node variable to specify different AZs for kubelets

* fix missing variable name change

* add support for nova servergroups

* Add documentation for openstack nova servergroups

* uppdate to TF 0.12.12 format and fix etcd

* revert for_each change

* fix variables and formatting in main.tf

* try to avoid errors

* update variable

* Update main.tf

* Update main.tf

* update all other instance resources

* Add a variable do disable access_ip

* Document the use of use_access_ip

* print hostnames (#5110)

Terrafrom - customize hosts root volume size

disable block_device by default value

Terraform formatting fix

Fixed typos

* fix resources after rebase

* Fix glusterfs image issue

This allows the user to optionally specify the dns_domain attribute on the
generated internal kubernetes network.

* Add wait for floating ip associate with instance

* Terraform formatting fix

* Sort Open Telekom Cloud in compatible list

* Add k8s_allowed_remote_ips variable

Useful for defining CIDRs allowed to initiate a SSH connection when
you don't want to use a bastion.

* Add TF_VAR_k8s_allowed_remote_ips variable to tf-apply-ovh

The openstackclient is the preferred CLI for OpenStack
environments and should be used instead of novaclient.

* [contrib/terraform/openstack] Add worker_allowed_ports

  Allow user to define in terraform template which ports and remote
  IPs that are allowed to access worker nodes. This is useful when you
  don't want to open up whole NodePort range to the outside world, or
  ports outside NodePort range.

* Replace `openstack_compute_secgroup_v2` with `openstack_networking_secgroup_v2`

The `openstack_networking_secgroup_v2` resource allow specifications of
both ingress and egress. Nova security groups define ingress rules only.

This change will also allow for more user-friendly specified security
rules, as the different security group resources have different HCL
syntax.

allow masters, nodes and gluster nodes (within each group) to be scheduled
on differents AZ.

* Add supplementary node groups

  To add additional ansible groups to the k8s nodes, such as
  `kube-ingress` for running ingress controller pods. Empty by default.

* [terraform/openstack] Restores ability to use existing public nodes and masters as bastion.

* [terraform/openstack] Uses network_id as output

* [terraform/openstack] Fixes link to inventory/local/group_vars

* [terraform/openstack] Adds supplementary master groups

* [terraform/openstack] Updates documentation avoiding manual setups for bastion (as they are not needed now).

* [terraform/openstack] Supplementary master groups in docs.

* [terraform/openstack] Fixes repeated usage of master fips instead of bastion fips

* [terraform/openstack] Missing change for network_id to subnet_id

* [terraform/openstack] Changes conditional to element( concat ) form to avoid type issues with empty lists.

Hardcoded variables are removed from variables.tf file because it might
not be suitable for all OpenStack Cloud depending on Identity API
version available (between v2 or v3) and preferred authentication
method.

* Adding bastion and private network provisioning for openstack terraform

* Remove usage of floating-ip property

* Combine openstack instances + floating ips

* Fix relating floating IPs to hosts for openstack builds

* Tighten up security groups

Allow ssh into all instances with floating IP

* Add the gluster hosts to the no-floating group

* Break terraform into modules

* Update README and var descriptions to match current config

* Remove volume property in gluster compute def

* Include cluster name in internal network and router names

* Make dns_nameservers a variable

Squashed commits:
[f9355ea1] Swap order in which we reload docker/socket
[2ca6819c] Reload docker.socket after installing flannel on coreos

Workaround for #569
[9f976e56] Vagrantfile: setup proxy inside virtual machines

In corporate networks, it is good to pre-configure proxy variables.
[9d7142f4] Vagrantfile: use Ubuntu 16.04 LTS

Use recent supported version of Ubuntu for local development setup
with Vagrant.
[50f77cca] Add CI test layouts

* Drop Wily from test matrix
* Replace the Wily cases dropped with extra cases to test separate
  roles deployment

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
[03e162b3] Update OWNERS
[c7b00cae] Use tar+register instead of copy/slurp for distributing tokens and certs

Related bug: https://github.com/ansible/ansible/issues/15405

Uses tar and register because synchronize module cannot sudo on the
remote side correctly and copy is too slow.

This patch dramatically cuts down the number of tasks to process
for cert synchronization.
[2778ac61] Add new var skip_dnsmasq_k8s

If skip_dnsmasq is set, it will still not set up dnsmasq
k8s pod. This enables independent setup of resolvconf section
before kubelet is up.