Add power blackout error

A blackout is when both BMC power and main power are lost.  This error
can be used to notify a user that this occurred, after the fact of
course.

Change-Id: I8d84c9753f0eeb395a989758692dbe5109b36f3f
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed