ONOS-6886 Move interface classes from incubator to core

Change-Id: Iaae4d98279e4b77fc3f0b5a63d547921f93aeb46
diff --git a/core/common/src/main/java/org/onosproject/utils/Comparators.java b/core/common/src/main/java/org/onosproject/utils/Comparators.java
index db91440..b5d843e 100644
--- a/core/common/src/main/java/org/onosproject/utils/Comparators.java
+++ b/core/common/src/main/java/org/onosproject/utils/Comparators.java
@@ -18,7 +18,7 @@
 import org.onosproject.cluster.ControllerNode;
 import org.onosproject.core.Application;
 import org.onosproject.core.ApplicationId;
-import org.onosproject.incubator.net.intf.Interface;
+import org.onosproject.net.intf.Interface;
 import org.onosproject.incubator.net.virtual.TenantId;
 import org.onosproject.incubator.net.virtual.VirtualDevice;
 import org.onosproject.incubator.net.virtual.VirtualNetwork;