* Added NetworkInterface.ip4_address
* Added HardwareManager.get_bmc_address()
* Added Memory.physical_mb
This is total memory as reported by dmidecode, and yes,
it's different from total, as it includes kernel reserved space.
* Added CPU.architecture
As a side effect, get_cpus was switched to lscpu.
Also fixes problem when get_cpus reported the current frequency
instead of maximum one.
Change-Id: I4080d4d551eb0bb995a94ef9a300351910c09fb9
17c7e05235