When setting the boot settings on Supermicro BMCs, the
BootSourceOverrideEnabled must be set to the desired
value whenever the BootSourceOverrideTarget is set or
it will revert to the default value (Once). This is
different than what is currently implemented for other
BMCs in which the BootSourceOverrideEnabled is not set
if it matches the current setting.
This change uses the vendor setting to determine if it's
a Supermicro BMC.
Story: 2008547
Task: 41652
Change-Id: I1b1a6baafd4cc4daa2fbdb82f69ded6253b1fcbf
4a7d50ce56