07686f475d
This patch is adding support for DevStack to configure nodes and environment (Ubuntu and Fedora) to deploy nodes in UEFI mode. A new configuration called IRONIC_BOOT_MODE was added to DevStack and supports two values: "bios" and "uefi". Defaults to "bios". Partial-Bug: #1625616 Change-Id: I4e9247c6a91c707db08247a8ac04b1f146cd3714