provider/openstack: gophercloud migration: Removing APIKey Attribute
provider/openstack: gophercloud migration: Removing APIKey Attribute

gophercloud/gophercloud no longer supports the APIKey authentication
attribute. Removal of this attribute may impact users who were using
the Terraform OpenStack provider in with vendor-modified clouds.

haxorof/terraform-provider-openstack,haxorof/terraform-provider-openstack,haxorof/terraform-provider-openstack