This patch is adding a redfish driver based on the sushy library. This
is just a basic driver that currently supports:
* Power: Hard power on/off/reboot, soft power off/reboot
* Management: Setting the boot device (PXE, disk, cd-rom and bios)
and its frequency (persistent or not)
* Management: NMI Injection
* SSL authentication
Unittest coverage for the redfish modules is now in 100%, let's try to
keep it this way (-:
Documentation and DevStack updates will be done on subsequent patches.
Partial-Bug: #1526477
Change-Id: I14470edff65cd14bb73263ec7310559a8eaa6c84
c21149454a