XCAT testing: Continuous power status and rvitals

This change includes:
    1. Power on BMC node.
    2. Repeatedly get power status and verify.
    3. Get temperature reading through XCAT.
    4. Get voltage reading through XCAT.
    5. Get wattage reading through XCAT.
    6. Get fanspeed through XCAT.

This resolves openbmc/openbmc-test-automation#779

Change-Id: I16e8bfcc65471d7012955788e8e35c4f71e02aa0
Signed-off-by: Prashanth Katti <prkatti1@in.ibm.com>
2 files changed