Update Event log clear request target

Changes -
    New implementation available target LogService.ClearLog

Change-Id: I16275a3dd27e0a584ef138492a2236da8705b8d4
Signed-off-by: Sushil Singh <susilsi7@in.ibm.com>
diff --git a/lib/logging_utils.robot b/lib/logging_utils.robot
index c9266ff..484c8de 100644
--- a/lib/logging_utils.robot
+++ b/lib/logging_utils.robot
@@ -223,5 +223,8 @@
 Redfish Purge Event Log
     [Documentation]  Do Redfish EventLog purge.
 
-    Redfish.Post  ${EVENT_LOG_URI}Actions/LogService.Reset
-    ...  valid_status_codes=[${HTTP_NO_CONTENT}]
+    ${target_action}=  redfish_utils.Get Target Actions
+    ...  /redfish/v1/Systems/system/LogServices/EventLog/  LogService.ClearLog
+    Redfish.Post  ${target_action}  body={'target': '${target_action}'}
+    ...  valid_status_codes=[${HTTP_OK}, ${HTTP_NO_CONTENT}]
+