ONOS-6886 Move interface classes from incubator to core

Change-Id: Iaae4d98279e4b77fc3f0b5a63d547921f93aeb46
diff --git a/apps/sdnip/src/main/java/org/onosproject/sdnip/SdnIpFib.java b/apps/sdnip/src/main/java/org/onosproject/sdnip/SdnIpFib.java
index 4300fa7..8488924 100644
--- a/apps/sdnip/src/main/java/org/onosproject/sdnip/SdnIpFib.java
+++ b/apps/sdnip/src/main/java/org/onosproject/sdnip/SdnIpFib.java
@@ -30,10 +30,10 @@
 import org.onlab.packet.VlanId;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.CoreService;
-import org.onosproject.incubator.net.intf.Interface;
-import org.onosproject.incubator.net.intf.InterfaceEvent;
-import org.onosproject.incubator.net.intf.InterfaceListener;
-import org.onosproject.incubator.net.intf.InterfaceService;
+import org.onosproject.net.intf.Interface;
+import org.onosproject.net.intf.InterfaceEvent;
+import org.onosproject.net.intf.InterfaceListener;
+import org.onosproject.net.intf.InterfaceService;
 import org.onosproject.incubator.net.routing.ResolvedRoute;
 import org.onosproject.incubator.net.routing.RouteEvent;
 import org.onosproject.incubator.net.routing.RouteListener;