Redfish python utility

Changes:
    - New redfish utility library code.
    - Move generic utility functions to new library.
    - Update test cases with new utility object acces.

Change-Id: Ia2bb18cb46ca93503853bbfd1773d3e4447339c9
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/bmc_redfish_resource.robot b/lib/bmc_redfish_resource.robot
index 9ed49c7..ab0db3d 100644
--- a/lib/bmc_redfish_resource.robot
+++ b/lib/bmc_redfish_resource.robot
@@ -6,6 +6,7 @@
 Library         bmc_redfish.py
 ...             ${OPENBMC_HOST}  ${OPENBMC_USERNAME}  ${OPENBMC_PASSWORD}
 ...             WITH NAME  redfish
+Library         bmc_redfish_utils.py  WITH NAME  redfish_utils
 Library         disable_warning_urllib.py
 
 *** Keywords ***