Added force tag for certificate suite

Change-Id: Ide1f85edb08746d710d8848eabcf1168f2c77d51
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/redfish/managers/test_certificate.robot b/redfish/managers/test_certificate.robot
index cb37375..6074b62 100644
--- a/redfish/managers/test_certificate.robot
+++ b/redfish/managers/test_certificate.robot
@@ -7,6 +7,8 @@
 Resource         ../../lib/certificate_utils.robot
 Library          String
 
+Force Tags       Certificate_Test
+
 Suite Setup      Suite Setup Execution
 Test Teardown    Test Teardown Execution