ResourceId to instance-identifier string converter methods

part of ONOS-7503

Change-Id: I5c0b0c0c38f51ea1a94208c0b7cb9d4be1db060f
diff --git a/apps/config/src/main/java/org/onosproject/d/config/DeviceResourceIds.java b/apps/config/src/main/java/org/onosproject/d/config/DeviceResourceIds.java
index 358b400..6e517a0 100644
--- a/apps/config/src/main/java/org/onosproject/d/config/DeviceResourceIds.java
+++ b/apps/config/src/main/java/org/onosproject/d/config/DeviceResourceIds.java
@@ -44,6 +44,7 @@
      */
     public static final String DCS_NAMESPACE = "org.onosproject.dcs";
 
+    // FIXME '/' is problematic name from RFC 7950/7951 point of view
     /**
      * SchemaId name for root node.
      */