GUI: Fixed Verify_Installed_CA_Certificate and Verify_Installed_LDAP_Certificate test case

Changes :-
    -  Redfish way to Install and verify CA and LDAP certificate, replaced old "Install Certificate File On BMC" keyword with new
 "Install And Verify Certificate Via Redfish" keyword

Tested :
    -  Successfully ran this from gui/gui_test/security_and_access_menu/test_certificates_sub_menu.robot

Change-Id: Idd1c697c08eff1aa5819c8364807c1c36e0480fe
Signed-off-by: rramyasr-in <rramyasr@in.ibm.com>
diff --git a/gui/gui_test/security_and_access_menu/test_certificates_sub_menu.robot b/gui/gui_test/security_and_access_menu/test_certificates_sub_menu.robot
index 3a56a4b..c261a19 100644
--- a/gui/gui_test/security_and_access_menu/test_certificates_sub_menu.robot
+++ b/gui/gui_test/security_and_access_menu/test_certificates_sub_menu.robot
@@ -85,7 +85,7 @@
 
     # Install CA certificate via Redfish.
     ${file_data}=  Generate Certificate File Data  CA
-    Install Certificate File On BMC  ${REDFISH_CA_CERTIFICATE_URI}  ok  data=${file_data}
+    Install And Verify Certificate Via Redfish  CA  Valid Certificate  ok
 
     # Refresh GUI and verify CA certificate availability in GUI.
     Refresh GUI
@@ -113,7 +113,7 @@
 
     # Install LDAP certificate.
     ${file_data}=  Generate Certificate File Data  Client
-    Install Certificate File On BMC  ${REDFISH_LDAP_CERTIFICATE_URI}  ok  data=${file_data}
+    Install And Verify Certificate Via Redfish  Client  Valid Certificate Valid Privatekey  ok
 
     # Refresh GUI and verify certificate is available in GUI.
     Refresh GUI