Rename OemVirtualMedia to OpenBMCVirtualMedia

Per the redfish spec, we should be naming these schemas correctly

Rename OemVirtualMedia -> OpenBMCVirtualMedia.

Tested:
These are only enabled when the option flag nbd-proxy is enabled, which
is commented out.  Code inspection only.

Change-Id: Ic94025e2125e5b44e09637024acf9b80897328bd
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/redfish-core/lib/virtual_media.hpp b/redfish-core/lib/virtual_media.hpp
index 37fb204..6e4be6d 100644
--- a/redfish-core/lib/virtual_media.hpp
+++ b/redfish-core/lib/virtual_media.hpp
@@ -259,7 +259,7 @@
     item["MediaTypes"] = nlohmann::json::array_t({"CD", "USBStick"});
     item["TransferMethod"] = "Stream";
     item["Oem"]["OpenBMC"]["@odata.type"] =
-        "#OemVirtualMedia.v1_0_0.VirtualMedia";
+        "#OpenBMCVirtualMedia.v1_0_0.VirtualMedia";
     item["Oem"]["OpenBMC"]["@odata.id"] = boost::urls::format(
         "/redfish/v1/Managers/{}/VirtualMedia/{}#/Oem/OpenBMC", name, resName);