Automation fix for VMI TC

Changes :
     -Modified "Configure VMI Static IP Address With Different User Roles" TC

Tested :
     - Ran successfully  test_vmi.robot

Change-Id: I3a3499c3588072e1bd4cd6deac07a97c24eea958
Signed-off-by: Megha G N <Megha.G.N@ibm.com>
diff --git a/openpower/ext_interfaces/test_vmi.robot b/openpower/ext_interfaces/test_vmi.robot
index 49fd47b..94f0e25 100644
--- a/openpower/ext_interfaces/test_vmi.robot
+++ b/openpower/ext_interfaces/test_vmi.robot
@@ -270,7 +270,8 @@
 Verify To Configure VMI Static IP Address With Different User Roles
     [Documentation]  Verify to configure vmi static ip address with different user roles.
     [Tags]  Verify_To_Configure_VMI_Static_IP_Address_With_Different_User_Roles
-    [Setup]  Create Users With Different Roles  users=${USERS}  force=${True}
+    [Setup]  Run Keywords  Delete BMC Users Using Redfish
+    ...  AND  Create Users With Different Roles  users=${USERS}  force=${True}
     [Template]  Config VMI Static IP Address Using Different Users
     [Teardown]  Delete BMC Users Using Redfish