Upgrade pre-checks screen does not show CONFIG_MERGE warning

      "href" : "http://172.22.81.58:8080/api/v1/clusters/cl1/rolling_upgrades_check/CONFIG_MERGE",
      "UpgradeChecks" : {
        "check" : "Configuration Merge Check",
        "check_type" : "CLUSTER",
        "cluster_name" : "cl1",
        "failed_detail" : [
          {
            "type" : "topology",
            "property" : "content",
            "current" : "<topology>\n\n            <gateway>\n\n                <provider>\n                    <role>authentication</role>\n                    <name>ShiroProvider</name>\n                    <enabled>true</enabled>\n                    <param>\n                        <name>sessionTimeout</name>\n                        <value>30</value>\n                    </param>\n                    <param>\n                        <name>main.ldapRealm</name>\n                        <value>org.apache.hadoop.gateway.shirorealm.KnoxLdapRealm</value>\n                    </param>\n                    <param>\n                        <name>main.ldapRealm.userDnTemplate</name>\n                        <value>uid=
        "id" : "CONFIG_MERGE",
        "reason" : "The following config types will have values overwritten: hive-interactive-env, topology, hadoop-env",
        "repository_version" : "2.6.0.2-24",
        "status" : "WARNING",
        "upgrade_type" : "NON_ROLLING"
      }
    }


    "id" : "HEALTH",
        "reason" : "The following issues have been detected on this cluster and should be addressed before upgrading: CRITICAL: NameNode Last Checkpoint: nats11-46-tups-erm16tofnsecha-s11-5.openstacklocal\nCRITICAL: NameNode Last Checkpoint: nats11-46-tups-erm16tofnsecha-s11-1",
        "repository_version" : "2.6.0.2-24",
        "status" : "WARNING",
        "upgrade_type" : "NON_ROLLING"