VirtualMedia fixes for Redfish Service Validator

Removes all warnings and errors for VirtualMedia
- rework for OemVirtualMedia
- minor adjustments for jsons

Tested:
Redfish Service Validator ran with no errors and/or warnings

Change-Id: Ic027166153a807a8bd3a6c04f042969f16e0dc6a
Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>
diff --git a/redfish-core/lib/virtual_media.hpp b/redfish-core/lib/virtual_media.hpp
index 0b5eb1a..cd81857 100644
--- a/redfish-core/lib/virtual_media.hpp
+++ b/redfish-core/lib/virtual_media.hpp
@@ -129,7 +129,7 @@
     item["MediaTypes"] = {"CD", "USBStick"};
     item["TransferMethod"] = "Stream";
     item["TransferProtocolType"] = nullptr;
-    item["Oem"]["OpenBmc"]["WebSocketEndpoint"] = nullptr;
+    item["Oem"]["OpenBMC"]["WebSocketEndpoint"] = nullptr;
     item["Oem"]["OpenBMC"]["@odata.type"] =
         "#OemVirtualMedia.v1_0_0.VirtualMedia";
 
@@ -1039,7 +1039,7 @@
             "#VirtualMediaCollection.VirtualMediaCollection";
         res.jsonValue["Name"] = "Virtual Media Services";
         res.jsonValue["@odata.id"] =
-            "/redfish/v1/Managers/" + name + "/VirtualMedia/";
+            "/redfish/v1/Managers/" + name + "/VirtualMedia";
 
         crow::connections::systemBus->async_method_call(
             [asyncResp, name](const boost::system::error_code ec,