Adds API methods to support rescue and unrescue.
After rescuing a node, it will be left running a rescue ramdisk,
configured with the rescue_password, and listening with ssh on the
specified network interfaces.
Unrescuing a node will return the node to Active.
Change-Id: I3953ff0b1ca000f8ae83fb7b3c663f848a149345
Partial-bug: #1526449
Co-Authored-By: Jay Faulkner <jay@jvf.cc>
Co-Authored-By: Josh Gachnang <josh@pcsforeducation.com>
Co-Authored-By: Jesse J. Cook <jesse.j.cook@member.fsf.org>
Co-Authored-By: Mario Villaplana <mario.villaplana@gmail.com>
Co-Authored-By: Aparna <aparnavtce@gmail.com>
Co-Authored-By: Shivanand Tendulker <stendulker@gmail.com>
49fabe6d7b