Refactor Comparator class to break dependency of core/net on the CLI

Change-Id: I6f3165f399ab448eff5c5d2232f4b96f10ebf57e
diff --git a/core/common/pom.xml b/core/common/pom.xml
index 4a53ed1..8d9dcf9 100644
--- a/core/common/pom.xml
+++ b/core/common/pom.xml
@@ -40,6 +40,10 @@
             <groupId>org.onosproject</groupId>
             <artifactId>onos-api</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-incubator-api</artifactId>
+        </dependency>
 
         <dependency>
             <groupId>org.onosproject</groupId>