Removed a cyclic dependency in the CLI code.
diff --git a/cli/src/main/java/org/onlab/onos/cli/net/ClusterDevicesCommand.java b/cli/src/main/java/org/onlab/onos/cli/net/ClusterDevicesCommand.java
index 9c68244..f09b185 100644
--- a/cli/src/main/java/org/onlab/onos/cli/net/ClusterDevicesCommand.java
+++ b/cli/src/main/java/org/onlab/onos/cli/net/ClusterDevicesCommand.java
@@ -3,6 +3,7 @@
 import com.google.common.collect.Lists;
 import org.apache.karaf.shell.commands.Argument;
 import org.apache.karaf.shell.commands.Command;
+import org.onlab.onos.cli.Comparators;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.topology.TopologyCluster;