Enable and disable power redundancy setting test

Added:
    - Test where we write and read it back.
    - Code alignment and cosmetic fixes.

Resolves  openbmc/openbmc-test-automation#1156

Change-Id: I50471b3459fde17067a9e2c1233ae5c917543368
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
1 file changed