Adds a job to boot a node over Redfish virtual media in legacy
BIOS boot mode. For sake of unification, similar PXE job has been
renamed.
Apparently, libvirt-based Redfish BMC emulation requires node
power-cycle for libvirt domain configuration changes to take
effect.
Change-Id: I2c7fc26b082db6eeae1abcd67362884a9c72c109