NTP Fix: Add valid status codes for patch operation

    Changes:
        Add valid status code such as HTTP_OK, HTTP_NO_CONTENT
        for Redfish Patch operation

    Tested:
        Ran and Tested on BMC Environment.

Change-Id: If6425d6418fb174e143840c4320d004377f915c0
Signed-off-by: Sweta Potthuri <spotthur@in.ibm.com>
diff --git a/lib/bmc_date_and_time_utils.robot b/lib/bmc_date_and_time_utils.robot
index 5489ec9..1b01945 100644
--- a/lib/bmc_date_and_time_utils.robot
+++ b/lib/bmc_date_and_time_utils.robot
@@ -47,6 +47,7 @@
         Wait Until Keyword Succeeds  1min  5sec
         ...  Redfish.Patch  ${REDFISH_BASE_URI}Managers/${MANAGER_ID}
         ...  body={'DateTime': '${date_time}'}  &{kwargs}
+        ...  valid_status_codes=[${HTTP_OK}, ${HTTP_NO_CONTENT}]
     ELSE
         ${date_time_formatted}=  Convert Date  ${date_time}  result_format=%Y-%m-%dT%H:%M:%S+00:00
         Wait Until Keyword Succeeds  1min  5sec