Added automation testcase to verify service user deletion

    Verify Deleting Service User

Change-Id: I748f60ed3889406f50fc48a1fbc0ab87f58a0b79
Signed-off-by: manashsarma <manashsarma@in.ibm.com>
diff --git a/openpower/service_account/test_service_user.robot b/openpower/service_account/test_service_user.robot
index ee43010..1eb53f7 100644
--- a/openpower/service_account/test_service_user.robot
+++ b/openpower/service_account/test_service_user.robot
@@ -45,12 +45,20 @@
 
 Verify Renaming Service User
      [Documentation]  Verify error while renaming service user via Redfish.
+     [Tags]  Verify_Renaming_Service_User
 
      ${payload}=  Create Dictionary  UserName=new_service
      Redfish.Patch  /redfish/v1/AccountService/Accounts/service  body=&{payload}
      ...  valid_status_codes=[${HTTP_BAD_REQUEST}]
 
 
+Verify Deleting Service User
+     [Documentation]  Verify error while deleting service user via Redfish.
+     [Tags]  Verify_Deleting_Service_User
+
+     Redfish.Delete  /redfish/v1/AccountService/Accounts/service  valid_status_codes=[${HTTP_BAD_REQUEST}]
+
+
 *** Keywords ***
 
 Suite Setup Execution