Add the Redfish message registries

This change adds the message registries used by bmcweb.

It includes the OEM OpenBMC.0.1.0 message registry and the
DMTF Base.1.4.0 message registry for reference.

Tested: Ran the Redfish Service Validator and got passing
results for the MessageRegistryCollection and the two
MessageRegsitryFiles.

Change-Id: I3e5756103006f065530253b5dbc0d7720cf616b9
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
diff --git a/redfish-core/lib/service_root.hpp b/redfish-core/lib/service_root.hpp
index bf66c2e..6041d32 100644
--- a/redfish-core/lib/service_root.hpp
+++ b/redfish-core/lib/service_root.hpp
@@ -37,6 +37,7 @@
         Node::json["Links"]["Sessions"] = {
             {"@odata.id", "/redfish/v1/SessionService/Sessions"}};
         Node::json["JsonSchemas"] = {{"@odata.id", "/redfish/v1/JsonSchemas"}};
+        Node::json["Registries"] = {{"@odata.id", "/redfish/v1/Registries"}};
 
         Node::json["UUID"] = getUuid();