Removed a cyclic dependency in the CLI code.
diff --git a/cli/src/main/java/org/onlab/onos/cli/net/DevicesListCommand.java b/cli/src/main/java/org/onlab/onos/cli/net/DevicesListCommand.java
index 6ecb482..6f0dd30 100644
--- a/cli/src/main/java/org/onlab/onos/cli/net/DevicesListCommand.java
+++ b/cli/src/main/java/org/onlab/onos/cli/net/DevicesListCommand.java
@@ -2,6 +2,7 @@
 
 import org.apache.karaf.shell.commands.Command;
 import org.onlab.onos.cli.AbstractShellCommand;
+import org.onlab.onos.cli.Comparators;
 import org.onlab.onos.net.Device;
 import org.onlab.onos.net.device.DeviceService;