Added test to verify service user login without ACF file

-- Verify Service User SSH Login Without ACF file

Change-Id: Id579a14b190d5ee9cb5006eaa6d0e962993ac3b1
Signed-off-by: manashsarma <manashsarma@in.ibm.com>
diff --git a/openpower/service_account/test_service_login.robot b/openpower/service_account/test_service_login.robot
index 92cddb2..85181af 100644
--- a/openpower/service_account/test_service_login.robot
+++ b/openpower/service_account/test_service_login.robot
@@ -42,6 +42,16 @@
     ...  Redfish.Login  service  ${SERVICE_USER_PASSWORD}
 
 
+Verify Service User SSH Login Without ACF file
+    [Documentation]  Verify service user ssh login failure without ACF file.
+    [Tags]  Verify_Service_User_SSH_Login_Without_ACF_file
+
+    Remove Existing ACF
+    SSHLibrary.Open Connection  ${OPENBMC_HOST}
+    ${status}=   Run Keyword And Return Status  SSHLibrary.Login  service  ${SERVICE_USER_PASSWORD}
+    Should Be Equal  ${status}  ${False}
+
+
 Verify Service Login Failure With Expired ACF
     [Documentation]  Verify service user login failure with expired ACF.
     [Tags]  Verify_Service_Login_Failure_With_Expired_ACF