Created a seperate test case for operator user

Changes:
     - Moved operator user related test out of
       Create_Session_And_Verify_Response_Code_Using_Different_Credentials
       test case and added a new seperate test case for it
     - This is done to skip operator user-related test

Tested: - Ran both the old and new test cases and they passed

Change-Id: Id03850e7ea4770a1d3c16ec32efac5f21c39b14a
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/redfish/service_root/test_sessions_management.robot b/redfish/service_root/test_sessions_management.robot
index 718cb25..e9085fa 100644
--- a/redfish/service_root/test_sessions_management.robot
+++ b/redfish/service_root/test_sessions_management.robot
@@ -35,6 +35,14 @@
     ${OPENBMC_USERNAME}  password             ${HTTP_UNAUTHORIZED}
     r00t                 password             ${HTTP_UNAUTHORIZED}
     admin_user           TestPwd123           ${HTTP_CREATED}
+
+
+Create Session And Verify Response Code Using Operator Credentials
+    [Documentation]  Create session and verify response code using operator credentials.
+    [Tags]  Create_Session_And_Verify_Response_Code_Using_Operator_Credentials
+    [Template]  Create Session And Verify Response Code
+
+    # username           password             valid_status_code
     operator_user        TestPwd123           ${HTTP_CREATED}