Should compere scheme.

- Bugfix for bug introduced in bugfix for ONOS-3509

Change-Id: I459112483e22c0493bf9c628a0540036f8ee779b
diff --git a/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java b/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java
index 06402cf..59bebf7 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java
@@ -325,7 +325,7 @@
         } else {
             // Only forward for ConfigProvider
             // Forwarding was added as a workaround for ONOS-490
-            if (!providerId.equals("cfg")) {
+            if (!providerId.scheme().equals("cfg")) {
                 return null;
             }
             // FIXME Temporary hack for NPE (ONOS-1171).