Fix for FRU related test case
Fix for FRU related test case

Changes:
    - URI changes for Power supplies
    - For loop to get all redfish components
    - FRU component variable name changes

Tested:
    - Ran test suite from sandbox successfully.

Signed-off-by: srichn28 <212e77d82537eddbb13d5fd39457927eb4ecdc92@in.ibm.com>
Change-Id: I7837c80762eaba4ffb9d50b59b08859c3e322f93

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation