Add support for deploying to Equinix Metal bare-metal servers

Adds an additional hw_config which is simplified (equinix-metal).
Adds support for skipping HW provisioning (pre-provisioned through EM).
Usage: deploy.sh [k8s]
Adds a few new helper functions, and updates existing to support changes.

Signed-off-by: Michael S. Pedersen <michaelx.pedersen@intel.com>
Signed-off-by: Victor Morales <v.morales@samsung.com>
Change-Id: I2f84c662d183ba224e0edd8a218abe8b46c1fe45
Signed-off-by: Victor Morales <v.morales@samsung.com>
Reviewed-on: https://gerrit.opnfv.org/gerrit/c/kuberef/+/71301
Tested-by: jenkins-ci <jenkins-opnfv-ci@opnfv.org>
Reviewed-by: Rihab Banday <rihab.banday@ericsson.com>
Reviewed-by: Victor Morales <chipahuac@hotmail.com>