vendor all the required terraform plugins#919

Merged

openshift-merge-robot merged 13 commits intoopenshift:masterfrom

abhinavdahiya:terraform_vendor

Dec 19, 2018

Commits on Dec 17, 2018

terraform/exec: add `plugins` dir in the terraform workspace to list of plugin dir
abhinavdahiya
committed
terraform/plugins: add `libvirt`, `aws`, `ignition`, `openstack` to KnownPlugins
abhinavdahiya
committed

Commits on Dec 18, 2018