Don't reject server and CA certs during device ONC validation

chromeos/test/data/network/invalid_settings_with_repairs.json

 {
     "global-disabled-technologies": {
          "DisableNetworkTypes": ["WiMAX"]
     },
     "duplicate-network-guid": {
           "NetworkConfigurations": [
              {
                "GUID": "1",
                 "Type": "WiFi",
                 "Name": "My WiFi Network",
@@ skipping 516 matching lines @@
           },
           { "GUID": "guid",
             "Type": "Ethernet",
             "Name": "eth0",
             "Ethernet": {
                 "Authentication": "None"
             }
           }
         ]
     },
-    "toplevel-server-and-ca-cert-dropped": {
-      "Type": "UnencryptedConfiguration",
-      "Certificates":
-      [ { "GUID": "3",
-          "PKCS12": "abc" ,
-          "Type": "Client" } ]
-    },
-    "toplevel-with-server-and-ca-cert": {
-      "Type": "UnencryptedConfiguration",
-      "Certificates":
-      [ { "TrustBits": ["Web"],
-          "GUID": "1",
-          "Type": "Authority",
-          "X509": "abc" },
-        { "GUID": "2",
-          "Type": "Server",
-          "X509": "abc" },
-        { "GUID": "3",
-          "PKCS12": "abc" ,
-          "Type": "Client" } ]
-    },
     "toplevel-with-repaired-networks": {
       "NetworkConfigurations":
       [ { "GUID": "{485d6076-dd44-6b6d-69787465725f5045}",
           "Type": "WiFi",
           "Name": "My WiFi Network",
           "WiFi": {
             "SSID": "ssid-none",
             "Security": "None" }
         },
         { "GUID": "{485d6076-dd44-6b6d-69787465725f5046}",
@@ skipping 28 matching lines @@
             "SSID": "ssid-wpa",
             "UnknownField1": "Value1",
             "Security": "WPA-PSK" }
         }
       ],
       "Certificates": [],
       "Type": "UnencryptedConfiguration",
       "UnknownField3": [],
     }
 }