Add support to collect OEM redfish path in FFDC

Changes:
     - Added new keyword to collect OEM redfish properties.
     - Added new variable OEM_REDFISH_PATH

Tested:
    robot -v OPENBMC_HOST:xx.xx.xx.xx -v OEM_REDFISH_PATH:/ibm/v1  tools/myffdc.robot

User can key in their own OEM path in the command line as above.

Change-Id: Ibdcd80bb3036a1f460320cb275e6267b8f4e1561
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/bmc_redfish_utils.py b/lib/bmc_redfish_utils.py
index 8ba416a..21358d7 100644
--- a/lib/bmc_redfish_utils.py
+++ b/lib/bmc_redfish_utils.py
@@ -297,7 +297,7 @@
                     continue
 
                 self._rest_response_ = \
-                    self._redfish_.get(resource, valid_status_codes=[200, 404, 500])
+                    self._redfish_.get(resource, valid_status_codes=[200, 404, 405, 500])
                 # Enumeration is done for available resources ignoring the
                 # ones for which response is not obtained.
                 if self._rest_response_.status != 200: